157745402 has 4 divisors (see below), whose sum is σ = 236618106. Its totient is φ = 78872700.

The previous prime is 157745387. The next prime is 157745411. The reversal of 157745402 is 204547751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204547751 = 13297 ⋅15383.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 39175081 = 10889^2 + 6259^2 .

It is a super-2 number, since 2×157745402² = 49767223704283208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39436349 + ... + 39436352.

Almost surely, 2^157745402 is an apocalyptic number.

157745402 is a deficient number, since it is larger than the sum of its proper divisors (78872704).

157745402 is an equidigital number, since it uses as much as digits as its factorization.

157745402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78872703.

The product of its (nonzero) digits is 39200, while the sum is 35.

The square root of 157745402 is about 12559.6736422568. The cubic root of 157745402 is about 540.3214843807.

The spelling of 157745402 in words is "one hundred fifty-seven million, seven hundred forty-five thousand, four hundred two".