26421961 has 4 divisors (see below), whose sum is σ = 27976212. Its totient is φ = 24867712.

The previous prime is 26421953. The next prime is 26421973. The reversal of 26421961 is 16912462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11943936 + 14478025 = 3456^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 26421961 - 2³ = 26421953 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26421061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777100 + ... + 777133.

It is an arithmetic number, because the mean of its divisors is an integer number (6994053).

Almost surely, 2^26421961 is an apocalyptic number.

It is an amenable number.

26421961 is a deficient number, since it is larger than the sum of its proper divisors (1554251).

26421961 is a wasteful number, since it uses less digits than its factorization.

26421961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554250.

The product of its digits is 5184, while the sum is 31.

The square root of 26421961 is about 5140.2296641298. The cubic root of 26421961 is about 297.8436525022.

The spelling of 26421961 in words is "twenty-six million, four hundred twenty-one thousand, nine hundred sixty-one".