157194725 has 6 divisors (see below), whose sum is σ = 194921490. Its totient is φ = 125755760.

The previous prime is 157194691. The next prime is 157194727. The reversal of 157194725 is 527491751.

It can be written as a sum of positive squares in 3 ways, for example, as 36590401 + 120604324 = 6049^2 + 10982^2 .

It is not a de Polignac number, because 157194725 - 2¹⁴ = 157178341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157194727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3143870 + ... + 3143919.

It is an arithmetic number, because the mean of its divisors is an integer number (32486915).

Almost surely, 2^157194725 is an apocalyptic number.

It is an amenable number.

157194725 is a deficient number, since it is larger than the sum of its proper divisors (37726765).

157194725 is an equidigital number, since it uses as much as digits as its factorization.

157194725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287799 (or 6287794 counting only the distinct ones).

The product of its digits is 88200, while the sum is 41.

The square root of 157194725 is about 12537.7320516910. The cubic root of 157194725 is about 539.6920111576.

The spelling of 157194725 in words is "one hundred fifty-seven million, one hundred ninety-four thousand, seven hundred twenty-five".