142117690 has 128 divisors (see below), whose sum is σ = 326592000. Its totient is φ = 43760640.

The previous prime is 142117681. The next prime is 142117691. The reversal of 142117690 is 96711241.

142117690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×142117690² = 40394875621872200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142117691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 953736 + ... + 953884.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^142117690 is an apocalyptic number.

142117690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142117690 is the 7540-th heptagonal number.

142117690 is an abundant number, since it is smaller than the sum of its proper divisors (184474310).

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

142117690 is a wasteful number, since it uses less digits than its factorization.

142117690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 142117690 is about 11921.3124277489. The cubic root of 142117690 is about 521.8544364948.

The spelling of 142117690 in words is "one hundred forty-two million, one hundred seventeen thousand, six hundred ninety".