157257701 has 4 divisors (see below), whose sum is σ = 166508172. Its totient is φ = 148007232.

The previous prime is 157257697. The next prime is 157257719. The reversal of 157257701 is 107752751.

It is a happy number.

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 136773025 + 20484676 = 11695^2 + 4526^2 .

It is a cyclic number.

It is not a de Polignac number, because 157257701 - 2² = 157257697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157257781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4625210 + ... + 4625243.

It is an arithmetic number, because the mean of its divisors is an integer number (41627043).

Almost surely, 2^157257701 is an apocalyptic number.

It is an amenable number.

157257701 is a deficient number, since it is larger than the sum of its proper divisors (9250471).

157257701 is an equidigital number, since it uses as much as digits as its factorization.

157257701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250470.

The product of its (nonzero) digits is 17150, while the sum is 35.

The square root of 157257701 is about 12540.2432592035. The cubic root of 157257701 is about 539.7640727495.

The spelling of 157257701 in words is "one hundred fifty-seven million, two hundred fifty-seven thousand, seven hundred one".