142130391 has 16 divisors (see below), whose sum is σ = 204301440. Its totient is φ = 87372000.

The previous prime is 142130389. The next prime is 142130413. The reversal of 142130391 is 193031241.

It is not a de Polignac number, because 142130391 - 2¹ = 142130389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142130321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62016 + ... + 64266.

It is an arithmetic number, because the mean of its divisors is an integer number (12768840).

Almost surely, 2^142130391 is an apocalyptic number.

142130391 is a deficient number, since it is larger than the sum of its proper divisors (62171049).

142130391 is a wasteful number, since it uses less digits than its factorization.

142130391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 142130391 is about 11921.8451172627. The cubic root of 142130391 is about 521.8699820044.

The spelling of 142130391 in words is "one hundred forty-two million, one hundred thirty thousand, three hundred ninety-one".