26142421 has 4 divisors (see below), whose sum is σ = 27279072. Its totient is φ = 25005772.

The previous prime is 26142407. The next prime is 26142433. The reversal of 26142421 is 12424162.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26142421 - 2¹⁵ = 26109653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26142392 and 26142401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26142521) 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, 568291 + ... + 568336.

It is an arithmetic number, because the mean of its divisors is an integer number (6819768).

Almost surely, 2^26142421 is an apocalyptic number.

It is an amenable number.

26142421 is a deficient number, since it is larger than the sum of its proper divisors (1136651).

26142421 is a wasteful number, since it uses less digits than its factorization.

26142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136650.

The product of its digits is 768, while the sum is 22.

The square root of 26142421 is about 5112.9659689851. The cubic root of 26142421 is about 296.7895473502.

Adding to 26142421 its reverse (12424162), we get a palindrome (38566583).

The spelling of 26142421 in words is "twenty-six million, one hundred forty-two thousand, four hundred twenty-one".