157287245 has 4 divisors (see below), whose sum is σ = 188744700. Its totient is φ = 125829792.

The previous prime is 157287233. The next prime is 157287287. The reversal of 157287245 is 542782751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74149321 + 83137924 = 8611^2 + 9118^2 .

It is a cyclic number.

It is not a de Polignac number, because 157287245 - 2⁶ = 157287181 is a prime.

It is a congruent number.

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, 15728720 + ... + 15728729.

It is an arithmetic number, because the mean of its divisors is an integer number (47186175).

Almost surely, 2^157287245 is an apocalyptic number.

It is an amenable number.

157287245 is a deficient number, since it is larger than the sum of its proper divisors (31457455).

157287245 is an equidigital number, since it uses as much as digits as its factorization.

157287245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31457454.

The product of its digits is 156800, while the sum is 41.

The square root of 157287245 is about 12541.4211714622. The cubic root of 157287245 is about 539.7978724534.

The spelling of 157287245 in words is "one hundred fifty-seven million, two hundred eighty-seven thousand, two hundred forty-five".