157942811 has 4 divisors (see below), whose sum is σ = 170092272. Its totient is φ = 145793352.

The previous prime is 157942793. The next prime is 157942819. The reversal of 157942811 is 118249751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118249751 = 4723 ⋅25037.

It is a cyclic number.

It is not a de Polignac number, because 157942811 - 2¹⁸ = 157680667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157942819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6074711 + ... + 6074736.

It is an arithmetic number, because the mean of its divisors is an integer number (42523068).

Almost surely, 2^157942811 is an apocalyptic number.

157942811 is a deficient number, since it is larger than the sum of its proper divisors (12149461).

157942811 is a wasteful number, since it uses less digits than its factorization.

157942811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12149460.

The product of its digits is 20160, while the sum is 38.

The square root of 157942811 is about 12567.5300278137. The cubic root of 157942811 is about 540.5467838374.

The spelling of 157942811 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, eight hundred eleven".