142646491 has 8 divisors (see below), whose sum is σ = 154652400. Its totient is φ = 130788192.

The previous prime is 142646489. The next prime is 142646501. The reversal of 142646491 is 194646241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142646491 - 2¹ = 142646489 is a prime.

It is a super-2 number, since 2×142646491² = 40696042789226162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142646491.

It is not an unprimeable number, because it can be changed into a prime (142646591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34885 + ... + 38758.

It is an arithmetic number, because the mean of its divisors is an integer number (19331550).

Almost surely, 2^142646491 is an apocalyptic number.

142646491 is a deficient number, since it is larger than the sum of its proper divisors (12005909).

142646491 is a wasteful number, since it uses less digits than its factorization.

142646491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73805.

The product of its digits is 41472, while the sum is 37.

The square root of 142646491 is about 11943.4706429915. The cubic root of 142646491 is about 522.5008856620.

The spelling of 142646491 in words is "one hundred forty-two million, six hundred forty-six thousand, four hundred ninety-one".