76157021 has 4 divisors (see below), whose sum is σ = 76339200. Its totient is φ = 75974844.

The previous prime is 76157009. The next prime is 76157041. The reversal of 76157021 is 12075167.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12075167 = 13 ⋅928859.

It is a cyclic number.

It is not a de Polignac number, because 76157021 - 2¹⁰ = 76155997 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 (76157041) 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, 90461 + ... + 91298.

It is an arithmetic number, because the mean of its divisors is an integer number (19084800).

Almost surely, 2^76157021 is an apocalyptic number.

It is an amenable number.

76157021 is a deficient number, since it is larger than the sum of its proper divisors (182179).

76157021 is a wasteful number, since it uses less digits than its factorization.

76157021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182178.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 76157021 is about 8726.7990122381. The cubic root of 76157021 is about 423.8738740940.

The spelling of 76157021 in words is "seventy-six million, one hundred fifty-seven thousand, twenty-one".