157458745 has 4 divisors (see below), whose sum is σ = 188950500. Its totient is φ = 125966992.

The previous prime is 157458731. The next prime is 157458761. The reversal of 157458745 is 547854751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547854751 = 41 ⋅13362311.

It can be written as a sum of positive squares in 2 ways, for example, as 70073641 + 87385104 = 8371^2 + 9348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157458745 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 157458695 and 157458704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15745870 + ... + 15745879.

It is an arithmetic number, because the mean of its divisors is an integer number (47237625).

Almost surely, 2^157458745 is an apocalyptic number.

It is an amenable number.

157458745 is a deficient number, since it is larger than the sum of its proper divisors (31491755).

157458745 is an equidigital number, since it uses as much as digits as its factorization.

157458745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31491754.

The product of its digits is 784000, while the sum is 46.

The square root of 157458745 is about 12548.2566518222. The cubic root of 157458745 is about 539.9939928458.

It can be divided in two parts, 157458 and 745, that added together give a triangular number (158203 = T₅₆₂).

The spelling of 157458745 in words is "one hundred fifty-seven million, four hundred fifty-eight thousand, seven hundred forty-five".