142217370 has 80 divisors (see below), whose sum is σ = 384277608. Its totient is φ = 37739520.

The previous prime is 142217357. The next prime is 142217401. The reversal of 142217370 is 73712241.

It is a happy number.

142217370 is a `hidden beast` number, since 1 + 422 + 173 + 70 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 84107241 + 58110129 = 9171^2 + 7623^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 272710 + ... + 273230.

Almost surely, 2^142217370 is an apocalyptic number.

142217370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 142217370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192138804).

142217370 is an abundant number, since it is smaller than the sum of its proper divisors (242060238).

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

142217370 is a wasteful number, since it uses less digits than its factorization.

142217370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 142217370 is about 11925.4924426625. The cubic root of 142217370 is about 521.9764158984.

The spelling of 142217370 in words is "one hundred forty-two million, two hundred seventeen thousand, three hundred seventy".