142644442 has 4 divisors (see below), whose sum is σ = 213966666. Its totient is φ = 71322220.

The previous prime is 142644427. The next prime is 142644443. The reversal of 142644442 is 244446241.

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., 139925241 + 2719201 = 11829^2 + 1649^2 .

It is not an unprimeable number, because it can be changed into a prime (142644443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35661109 + ... + 35661112.

Almost surely, 2^142644442 is an apocalyptic number.

142644442 is a deficient number, since it is larger than the sum of its proper divisors (71322224).

142644442 is an equidigital number, since it uses as much as digits as its factorization.

142644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71322223.

The product of its digits is 24576, while the sum is 31.

The square root of 142644442 is about 11943.3848635971. The cubic root of 142644442 is about 522.4983838843.

The spelling of 142644442 in words is "one hundred forty-two million, six hundred forty-four thousand, four hundred forty-two".