77265021 has 8 divisors (see below), whose sum is σ = 103983264. Its totient is φ = 51028400.

The previous prime is 77265011. The next prime is 77265029. The reversal of 77265021 is 12056277.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77265021 - 2⁷ = 77264893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77265021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77265029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120030 + ... + 120671.

It is an arithmetic number, because the mean of its divisors is an integer number (12997908).

Almost surely, 2^77265021 is an apocalyptic number.

It is an amenable number.

77265021 is a deficient number, since it is larger than the sum of its proper divisors (26718243).

77265021 is a wasteful number, since it uses less digits than its factorization.

77265021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240811.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 77265021 is about 8790.0523889224. The cubic root of 77265021 is about 425.9196160789.

The spelling of 77265021 in words is "seventy-seven million, two hundred sixty-five thousand, twenty-one".