157742775 has 24 divisors (see below), whose sum is σ = 289780560. Its totient is φ = 84129120.

The previous prime is 157742743. The next prime is 157742777. The reversal of 157742775 is 577247751.

157742775 is a `hidden beast` number, since 1 + 577 + 4 + 2 + 7 + 75 = 666.

It is not a de Polignac number, because 157742775 - 2⁵ = 157742743 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 157742775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157742777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116172 + ... + 117521.

It is an arithmetic number, because the mean of its divisors is an integer number (12074190).

Almost surely, 2^157742775 is an apocalyptic number.

157742775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

157742775 is a deficient number, since it is larger than the sum of its proper divisors (132037785).

157742775 is a wasteful number, since it uses less digits than its factorization.

157742775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233712 (or 233701 counting only the distinct ones).

The product of its digits is 480200, while the sum is 45.

The square root of 157742775 is about 12559.5690610785. The cubic root of 157742775 is about 540.3184849643.

The spelling of 157742775 in words is "one hundred fifty-seven million, seven hundred forty-two thousand, seven hundred seventy-five".