142660457 has 4 divisors (see below), whose sum is σ = 142703616. Its totient is φ = 142617300.

The previous prime is 142660439. The next prime is 142660477. The reversal of 142660457 is 754066241.

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: 754066241 = 1033 ⋅729977.

It is a cyclic number.

It is not a de Polignac number, because 142660457 - 2¹² = 142656361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142660477) 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, 16169 + ... + 23382.

It is an arithmetic number, because the mean of its divisors is an integer number (35675904).

Almost surely, 2^142660457 is an apocalyptic number.

It is an amenable number.

142660457 is a deficient number, since it is larger than the sum of its proper divisors (43159).

142660457 is an equidigital number, since it uses as much as digits as its factorization.

142660457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43158.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 142660457 is about 11944.0552996041. The cubic root of 142660457 is about 522.5179371604.

The spelling of 142660457 in words is "one hundred forty-two million, six hundred sixty thousand, four hundred fifty-seven".