157542157 has 4 divisors (see below), whose sum is σ = 164391840. Its totient is φ = 150692476.

The previous prime is 157542109. The next prime is 157542197. The reversal of 157542157 is 751245751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751245751 = 11057 ⋅67943.

It is a cyclic number.

It is not a de Polignac number, because 157542157 - 2⁷ = 157542029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157542197) 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, 3424807 + ... + 3424852.

It is an arithmetic number, because the mean of its divisors is an integer number (41097960).

Almost surely, 2^157542157 is an apocalyptic number.

It is an amenable number.

157542157 is a deficient number, since it is larger than the sum of its proper divisors (6849683).

157542157 is an equidigital number, since it uses as much as digits as its factorization.

157542157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849682.

The product of its digits is 49000, while the sum is 37.

The square root of 157542157 is about 12551.5798607187. The cubic root of 157542157 is about 540.0893279293.

The spelling of 157542157 in words is "one hundred fifty-seven million, five hundred forty-two thousand, one hundred fifty-seven".