142597440 has 168 divisors, whose sum is σ = 498469920. Its totient is φ = 37407744.

The previous prime is 142597439. The next prime is 142597457. The reversal of 142597440 is 44795241.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 142597395 and 142597404.

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, 192591 + ... + 193329.

Almost surely, 2^142597440 is an apocalyptic number.

142597440 is a gapful number since it is divisible by the number (10) 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 142597440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249234960).

142597440 is an abundant number, since it is smaller than the sum of its proper divisors (355872480).

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

142597440 is a wasteful number, since it uses less digits than its factorization.

142597440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 142597440 is about 11941.4170013445. The cubic root of 142597440 is about 522.4409890393.

The spelling of 142597440 in words is "one hundred forty-two million, five hundred ninety-seven thousand, four hundred forty".