142997540 has 48 divisors (see below), whose sum is σ = 363388032. Its totient is φ = 46142976.

The previous prime is 142997539. The next prime is 142997549. The reversal of 142997540 is 45799241.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (142997549) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 27662 + ... + 32421.

It is an arithmetic number, because the mean of its divisors is an integer number (7570584).

Almost surely, 2^142997540 is an apocalyptic number.

142997540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142997540 is an abundant number, since it is smaller than the sum of its proper divisors (220390492).

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

142997540 is a wasteful number, since it uses less digits than its factorization.

142997540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60116 (or 60114 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 142997540 is about 11958.1578848918. The cubic root of 142997540 is about 522.9291545265.

The spelling of 142997540 in words is "one hundred forty-two million, nine hundred ninety-seven thousand, five hundred forty".