142561051 has 4 divisors (see below), whose sum is σ = 144977400. Its totient is φ = 140144704.

The previous prime is 142561021. The next prime is 142561057. The reversal of 142561051 is 150165241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142561051 - 2⁵ = 142561019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142561057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208086 + ... + 1208203.

It is an arithmetic number, because the mean of its divisors is an integer number (36244350).

Almost surely, 2^142561051 is an apocalyptic number.

142561051 is a deficient number, since it is larger than the sum of its proper divisors (2416349).

142561051 is an equidigital number, since it uses as much as digits as its factorization.

142561051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416348.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 142561051 is about 11939.8932574793. The cubic root of 142561051 is about 522.3965452248.

The spelling of 142561051 in words is "one hundred forty-two million, five hundred sixty-one thousand, fifty-one".