142156357 has 4 divisors (see below), whose sum is σ = 162464416. Its totient is φ = 121848300.

The previous prime is 142156337. The next prime is 142156361. The reversal of 142156357 is 753651241.

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: 753651241 = 7 ⋅107664463.

It is a de Polignac number, because none of the positive numbers 2^k-142156357 is a prime.

It is a super-2 number, since 2×142156357² = 40416859671022898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142156327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10154019 + ... + 10154032.

It is an arithmetic number, because the mean of its divisors is an integer number (40616104).

Almost surely, 2^142156357 is an apocalyptic number.

It is an amenable number.

142156357 is a deficient number, since it is larger than the sum of its proper divisors (20308059).

142156357 is an equidigital number, since it uses as much as digits as its factorization.

142156357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20308058.

The product of its digits is 25200, while the sum is 34.

The square root of 142156357 is about 11922.9340768118. The cubic root of 142156357 is about 521.9017604550.

The spelling of 142156357 in words is "one hundred forty-two million, one hundred fifty-six thousand, three hundred fifty-seven".