142274820 has 24 divisors (see below), whose sum is σ = 398369664. Its totient is φ = 37939936.

The previous prime is 142274809. The next prime is 142274863. The reversal of 142274820 is 28472241.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1185564 + ... + 1185683.

It is an arithmetic number, because the mean of its divisors is an integer number (16598736).

Almost surely, 2^142274820 is an apocalyptic number.

142274820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142274820 is an abundant number, since it is smaller than the sum of its proper divisors (256094844).

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

142274820 is a wasteful number, since it uses less digits than its factorization.

142274820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371259 (or 2371257 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 142274820 is about 11927.9009050210. The cubic root of 142274820 is about 522.0466921431.

The spelling of 142274820 in words is "one hundred forty-two million, two hundred seventy-four thousand, eight hundred twenty".