142331402 has 4 divisors (see below), whose sum is σ = 213497106. Its totient is φ = 71165700.

The previous prime is 142331401. The next prime is 142331407. The reversal of 142331402 is 204133241.

142331402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86694721 + 55636681 = 9311^2 + 7459^2 .

It is not an unprimeable number, because it can be changed into a prime (142331401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35582849 + ... + 35582852.

Almost surely, 2^142331402 is an apocalyptic number.

142331402 is a deficient number, since it is larger than the sum of its proper divisors (71165704).

142331402 is an equidigital number, since it uses as much as digits as its factorization.

142331402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71165703.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142331402 is about 11930.2725031744. The cubic root of 142331402 is about 522.1158881096.

Adding to 142331402 its reverse (204133241), we get a palindrome (346464643).

The spelling of 142331402 in words is "one hundred forty-two million, three hundred thirty-one thousand, four hundred two".