142400051 has 8 divisors (see below), whose sum is σ = 143582544. Its totient is φ = 141222880.

The previous prime is 142400021. The next prime is 142400053. The reversal of 142400051 is 150004241.

142400051 = 318² + 319² + ... + 771².

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

It is a cyclic number.

It is not a de Polignac number, because 142400051 - 2²² = 138205747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142400053) 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, 65441 + ... + 67581.

It is an arithmetic number, because the mean of its divisors is an integer number (17947818).

Almost surely, 2^142400051 is an apocalyptic number.

142400051 is a deficient number, since it is larger than the sum of its proper divisors (1182493).

142400051 is a wasteful number, since it uses less digits than its factorization.

142400051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 142400051 is about 11933.1492490457. The cubic root of 142400051 is about 522.1998165848.

Adding to 142400051 its reverse (150004241), we get a palindrome (292404292).

The spelling of 142400051 in words is "one hundred forty-two million, four hundred thousand, fifty-one".