142190657 has 4 divisors (see below), whose sum is σ = 162503616. Its totient is φ = 121877700.

The previous prime is 142190621. The next prime is 142190663. The reversal of 142190657 is 756091241.

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: 756091241 = 12671 ⋅59671.

It is not a de Polignac number, because 142190657 - 2⁸ = 142190401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142190617) 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, 10156469 + ... + 10156482.

It is an arithmetic number, because the mean of its divisors is an integer number (40625904).

Almost surely, 2^142190657 is an apocalyptic number.

It is an amenable number.

142190657 is a deficient number, since it is larger than the sum of its proper divisors (20312959).

142190657 is an equidigital number, since it uses as much as digits as its factorization.

142190657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20312958.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 142190657 is about 11924.3723943862. The cubic root of 142190657 is about 521.9437325276.

The spelling of 142190657 in words is "one hundred forty-two million, one hundred ninety thousand, six hundred fifty-seven".