265426021 has 4 divisors (see below), whose sum is σ = 303344032. Its totient is φ = 227508012.

The previous prime is 265426013. The next prime is 265426027. The reversal of 265426021 is 120624562.

265426021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 265426021 - 2³ = 265426013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265426027) 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, 18958995 + ... + 18959008.

It is an arithmetic number, because the mean of its divisors is an integer number (75836008).

Almost surely, 2^265426021 is an apocalyptic number.

It is an amenable number.

265426021 is a deficient number, since it is larger than the sum of its proper divisors (37918011).

265426021 is an equidigital number, since it uses as much as digits as its factorization.

265426021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37918010.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 265426021 is about 16291.9004723206. The cubic root of 265426021 is about 642.6598458695.

The spelling of 265426021 in words is "two hundred sixty-five million, four hundred twenty-six thousand, twenty-one".