157142839 has 4 divisors (see below), whose sum is σ = 179591824. Its totient is φ = 134693856.

The previous prime is 157142837. The next prime is 157142857. The reversal of 157142839 is 938241751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157142839 - 2¹ = 157142837 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 (157142833) 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, 11224482 + ... + 11224495.

It is an arithmetic number, because the mean of its divisors is an integer number (44897956).

Almost surely, 2^157142839 is an apocalyptic number.

157142839 is a deficient number, since it is larger than the sum of its proper divisors (22448985).

157142839 is an equidigital number, since it uses as much as digits as its factorization.

157142839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22448984.

The product of its digits is 60480, while the sum is 40.

The square root of 157142839 is about 12535.6626869105. The cubic root of 157142839 is about 539.6326250656.

The spelling of 157142839 in words is "one hundred fifty-seven million, one hundred forty-two thousand, eight hundred thirty-nine".