142549491 has 16 divisors (see below), whose sum is σ = 217603584. Its totient is φ = 81312384.

The previous prime is 142549427. The next prime is 142549507. The reversal of 142549491 is 194945241.

It is not a de Polignac number, because 142549491 - 2⁶ = 142549427 is a prime.

It is a super-3 number, since 3×142549491³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (142549391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6730 + ... + 18176.

It is an arithmetic number, because the mean of its divisors is an integer number (13600224).

Almost surely, 2^142549491 is an apocalyptic number.

142549491 is a deficient number, since it is larger than the sum of its proper divisors (75054093).

142549491 is a wasteful number, since it uses less digits than its factorization.

142549491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12050.

The product of its digits is 51840, while the sum is 39.

The square root of 142549491 is about 11939.4091562355. The cubic root of 142549491 is about 522.3824248012.

The spelling of 142549491 in words is "one hundred forty-two million, five hundred forty-nine thousand, four hundred ninety-one".