157422497 has 2 divisors, whose sum is σ = 157422498. Its totient is φ = 157422496.

The previous prime is 157422491. The next prime is 157422509. The reversal of 157422497 is 794224751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133841761 + 23580736 = 11569^2 + 4856^2 .

It is a cyclic number.

It is not a de Polignac number, because 157422497 - 2⁴ = 157422481 is a prime.

It is not a weakly prime, because it can be changed into another prime (157422491) 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 as a sum of consecutive naturals, namely, 78711248 + 78711249.

It is an arithmetic number, because the mean of its divisors is an integer number (78711249).

Almost surely, 2^157422497 is an apocalyptic number.

It is an amenable number.

157422497 is a deficient number, since it is larger than the sum of its proper divisors (1).

157422497 is an equidigital number, since it uses as much as digits as its factorization.

157422497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 41.

The square root of 157422497 is about 12546.8122246250. The cubic root of 157422497 is about 539.9525529871.

The spelling of 157422497 in words is "one hundred fifty-seven million, four hundred twenty-two thousand, four hundred ninety-seven".