142131399 has 8 divisors (see below), whose sum is σ = 189932400. Its totient is φ = 94542336.

The previous prime is 142131397. The next prime is 142131427. The reversal of 142131399 is 993131241.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142131399 - 2¹ = 142131397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142131397) 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, 51412 + ... + 54105.

It is an arithmetic number, because the mean of its divisors is an integer number (23741550).

Almost surely, 2^142131399 is an apocalyptic number.

142131399 is a deficient number, since it is larger than the sum of its proper divisors (47801001).

142131399 is a wasteful number, since it uses less digits than its factorization.

142131399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105969.

The product of its digits is 5832, while the sum is 33.

The square root of 142131399 is about 11921.8873925230. The cubic root of 142131399 is about 521.8712157159.

The spelling of 142131399 in words is "one hundred forty-two million, one hundred thirty-one thousand, three hundred ninety-nine".