157002001 has 4 divisors (see below), whose sum is σ = 169079092. Its totient is φ = 144924912.

The previous prime is 157001981. The next prime is 157002019. The reversal of 157002001 is 100200751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90155025 + 66846976 = 9495^2 + 8176^2 .

It is a cyclic number.

It is not a de Polignac number, because 157002001 - 2¹⁵ = 156969233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157002061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6038526 + ... + 6038551.

It is an arithmetic number, because the mean of its divisors is an integer number (42269773).

Almost surely, 2^157002001 is an apocalyptic number.

It is an amenable number.

157002001 is a deficient number, since it is larger than the sum of its proper divisors (12077091).

157002001 is a wasteful number, since it uses less digits than its factorization.

157002001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12077090.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 157002001 is about 12530.0439344800. The cubic root of 157002001 is about 539.4713630857.

Adding to 157002001 its reverse (100200751), we get a palindrome (257202752).

The spelling of 157002001 in words is "one hundred fifty-seven million, two thousand, one".