1021157157 has 16 divisors (see below), whose sum is σ = 1380585600. Its totient is φ = 671311872.

The previous prime is 1021157153. The next prime is 1021157227. The reversal of 1021157157 is 7517511201.

It is not a de Polignac number, because 1021157157 - 2² = 1021157153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021157153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59893 + ... + 75029.

It is an arithmetic number, because the mean of its divisors is an integer number (86286600).

Almost surely, 2^1021157157 is an apocalyptic number.

It is an amenable number.

1021157157 is a deficient number, since it is larger than the sum of its proper divisors (359428443).

1021157157 is a wasteful number, since it uses less digits than its factorization.

1021157157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15452.

The product of its (nonzero) digits is 2450, while the sum is 30.

The square root of 1021157157 is about 31955.5497058023. The cubic root of 1021157157 is about 1007.0032260008.

Adding to 1021157157 its reverse (7517511201), we get a palindrome (8538668358).

The spelling of 1021157157 in words is "one billion, twenty-one million, one hundred fifty-seven thousand, one hundred fifty-seven".