376521021 has 8 divisors (see below), whose sum is σ = 557808960. Its totient is φ = 251013996.

The previous prime is 376520983. The next prime is 376521037. The reversal of 376521021 is 120125673.

It is a happy number.

376521021 is a `hidden beast` number, since 3 + 7 + 652 + 1 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 376521021 - 2⁹ = 376520509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 13945223 = 376521021 / (3 + 7 + 6 + 5 + 2 + 1 + 0 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (376521121) 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, 6972585 + ... + 6972638.

It is an arithmetic number, because the mean of its divisors is an integer number (69726120).

Almost surely, 2^376521021 is an apocalyptic number.

It is an amenable number.

376521021 is a deficient number, since it is larger than the sum of its proper divisors (181287939).

376521021 is a wasteful number, since it uses less digits than its factorization.

376521021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13945232 (or 13945226 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 376521021 is about 19404.1495819837. The cubic root of 376521021 is about 722.0984441033.

Adding to 376521021 its reverse (120125673), we get a palindrome (496646694).

The spelling of 376521021 in words is "three hundred seventy-six million, five hundred twenty-one thousand, twenty-one".