157457243 has 2 divisors, whose sum is σ = 157457244. Its totient is φ = 157457242.

The previous prime is 157457239. The next prime is 157457249. The reversal of 157457243 is 342754751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157457243 - 2² = 157457239 is a prime.

It is a super-2 number, since 2×157457243² = 49585566746322098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 157457197 and 157457206.

It is not a weakly prime, because it can be changed into another prime (157457249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78728621 + 78728622.

It is an arithmetic number, because the mean of its divisors is an integer number (78728622).

Almost surely, 2^157457243 is an apocalyptic number.

157457243 is a deficient number, since it is larger than the sum of its proper divisors (1).

157457243 is an equidigital number, since it uses as much as digits as its factorization.

157457243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 38.

The square root of 157457243 is about 12548.1968027283. The cubic root of 157457243 is about 539.9922758383.

The spelling of 157457243 in words is "one hundred fifty-seven million, four hundred fifty-seven thousand, two hundred forty-three".