142540390 has 32 divisors (see below), whose sum is σ = 260457120. Its totient is φ = 56160000.

The previous prime is 142540379. The next prime is 142540439. The reversal of 142540390 is 93045241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273330 + ... + 273850.

It is an arithmetic number, because the mean of its divisors is an integer number (8139285).

Almost surely, 2^142540390 is an apocalyptic number.

142540390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142540390 is a deficient number, since it is larger than the sum of its proper divisors (117916730).

142540390 is a wasteful number, since it uses less digits than its factorization.

142540390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 142540390 is about 11939.0280173890. The cubic root of 142540390 is about 522.3713074842.

The spelling of 142540390 in words is "one hundred forty-two million, five hundred forty thousand, three hundred ninety".