142517894 has 8 divisors (see below), whose sum is σ = 213944328. Its totient is φ = 71203120.

The previous prime is 142517891. The next prime is 142517939. The reversal of 142517894 is 498715241.

142517894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×142517894² = 40622700220390472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142517891) 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, 24647 + ... + 29874.

It is an arithmetic number, because the mean of its divisors is an integer number (26743041).

Almost surely, 2^142517894 is an apocalyptic number.

142517894 is a deficient number, since it is larger than the sum of its proper divisors (71426434).

142517894 is a wasteful number, since it uses less digits than its factorization.

142517894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55830.

The product of its digits is 80640, while the sum is 41.

The square root of 142517894 is about 11938.0858599693. The cubic root of 142517894 is about 522.3438254884.

The spelling of 142517894 in words is "one hundred forty-two million, five hundred seventeen thousand, eight hundred ninety-four".