142631440 has 40 divisors (see below), whose sum is σ = 378993600. Its totient is φ = 48902016.

The previous prime is 142631399. The next prime is 142631443. The reversal of 142631440 is 44136241.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (142631443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126790 + ... + 127909.

It is an arithmetic number, because the mean of its divisors is an integer number (9474840).

Almost surely, 2^142631440 is an apocalyptic number.

142631440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142631440 is an abundant number, since it is smaller than the sum of its proper divisors (236362160).

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

142631440 is a wasteful number, since it uses less digits than its factorization.

142631440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254719 (or 254713 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 142631440 is about 11942.8405331395. The cubic root of 142631440 is about 522.4825082093.

Adding to 142631440 its reverse (44136241), we get a palindrome (186767681).

The spelling of 142631440 in words is "one hundred forty-two million, six hundred thirty-one thousand, four hundred forty".