26121401 has 4 divisors (see below), whose sum is σ = 27657972. Its totient is φ = 24584832.

The previous prime is 26121383. The next prime is 26121413. The reversal of 26121401 is 10412162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10412162 = 2 ⋅5206081.

It can be written as a sum of positive squares in 2 ways, for example, as 9759376 + 16362025 = 3124^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 26121401 - 2¹⁰ = 26120377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1536553 = 26121401 / (2 + 6 + 1 + 2 + 1 + 4 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26121401.

It is not an unprimeable number, because it can be changed into a prime (26121461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768260 + ... + 768293.

It is an arithmetic number, because the mean of its divisors is an integer number (6914493).

Almost surely, 2^26121401 is an apocalyptic number.

It is an amenable number.

26121401 is a deficient number, since it is larger than the sum of its proper divisors (1536571).

26121401 is a wasteful number, since it uses less digits than its factorization.

26121401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536570.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 26121401 is about 5110.9099972510. The cubic root of 26121401 is about 296.7099807705.

Adding to 26121401 its reverse (10412162), we get a palindrome (36533563).

The spelling of 26121401 in words is "twenty-six million, one hundred twenty-one thousand, four hundred one".