142156977 has 4 divisors (see below), whose sum is σ = 189542640. Its totient is φ = 94771316.

The previous prime is 142156969. The next prime is 142156991. The reversal of 142156977 is 779651241.

It is a happy number.

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: 779651241 = 3 ⋅259883747.

It is a cyclic number.

It is not a de Polignac number, because 142156977 - 2³ = 142156969 is a prime.

It is a super-2 number, since 2×142156977² = 40417212219557058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142156957) 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, 23692827 + ... + 23692832.

It is an arithmetic number, because the mean of its divisors is an integer number (47385660).

Almost surely, 2^142156977 is an apocalyptic number.

It is an amenable number.

142156977 is a deficient number, since it is larger than the sum of its proper divisors (47385663).

142156977 is an equidigital number, since it uses as much as digits as its factorization.

142156977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47385662.

The product of its digits is 105840, while the sum is 42.

The square root of 142156977 is about 11922.9600770949. The cubic root of 142156977 is about 521.9025191938.

The spelling of 142156977 in words is "one hundred forty-two million, one hundred fifty-six thousand, nine hundred seventy-seven".