142131540 has 24 divisors (see below), whose sum is σ = 397968480. Its totient is φ = 37901728.

The previous prime is 142131491. The next prime is 142131551. The reversal of 142131540 is 45131241.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1184370 + ... + 1184489.

It is an arithmetic number, because the mean of its divisors is an integer number (16582020).

Almost surely, 2^142131540 is an apocalyptic number.

142131540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142131540 is an abundant number, since it is smaller than the sum of its proper divisors (255836940).

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

142131540 is a wasteful number, since it uses less digits than its factorization.

142131540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368871 (or 2368869 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 142131540 is about 11921.8933060148. The cubic root of 142131540 is about 521.8713882882.

Adding to 142131540 its reverse (45131241), we get a palindrome (187262781).

It can be divided in two parts, 14213 and 1540, that added together give a triangular number (15753 = T₁₇₇).

The spelling of 142131540 in words is "one hundred forty-two million, one hundred thirty-one thousand, five hundred forty".