142457646 has 16 divisors (see below), whose sum is σ = 285065424. Its totient is φ = 47460864.

The previous prime is 142457641. The next prime is 142457663. The reversal of 142457646 is 646754241.

It is a super-2 number, since 2×142457646² = 40588361807722632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142457641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8910 + ... + 19086.

It is an arithmetic number, because the mean of its divisors is an integer number (17816589).

Almost surely, 2^142457646 is an apocalyptic number.

142457646 is an abundant number, since it is smaller than the sum of its proper divisors (142607778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142457646 is a wasteful number, since it uses less digits than its factorization.

142457646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12515.

The product of its digits is 161280, while the sum is 39.

The square root of 142457646 is about 11935.5622406320. The cubic root of 142457646 is about 522.2702099222.

The spelling of 142457646 in words is "one hundred forty-two million, four hundred fifty-seven thousand, six hundred forty-six".