142321788 has 72 divisors (see below), whose sum is σ = 414482432. Its totient is φ = 40334112.

The previous prime is 142321757. The next prime is 142321819. The reversal of 142321788 is 887123241.

It is an interprime number because it is at equal distance from previous prime (142321757) and next prime (142321819).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29781 + ... + 34227.

Almost surely, 2^142321788 is an apocalyptic number.

142321788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142321788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207241216).

142321788 is an abundant number, since it is smaller than the sum of its proper divisors (272160644).

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

142321788 is a wasteful number, since it uses less digits than its factorization.

142321788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591 (or 4586 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 142321788 is about 11929.8695717933. The cubic root of 142321788 is about 522.1041321300.

The spelling of 142321788 in words is "one hundred forty-two million, three hundred twenty-one thousand, seven hundred eighty-eight".