142256454561 has 81 divisors (see below), whose sum is σ = 235293022809. Its totient is φ = 82772000064.

The previous prime is 142256454553. The next prime is 142256454577. The reversal of 142256454561 is 165454652241.

The square root of 142256454561 is 377169.

It is a perfect power (a square), and thus also a powerful number.

142256454561 is a `hidden beast` number, since 1 + 4 + 2 + 25 + 64 + 5 + 4 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 386712225 + 141869742336 = 19665^2 + 376656^2 .

It is not a de Polignac number, because 142256454561 - 2³ = 142256454553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142256454511) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 279481975 + ... + 279482483.

Almost surely, 2^142256454561 is an apocalyptic number.

142256454561 is the 377169-th square number.

142256454561 is the 188585-th centered octagonal number.

It is an amenable number.

142256454561 is a deficient number, since it is larger than the sum of its proper divisors (93036568248).

142256454561 is an equidigital number, since it uses as much as digits as its factorization.

142256454561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088 (or 544 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 142256454561 in words is "one hundred forty-two billion, two hundred fifty-six million, four hundred fifty-four thousand, five hundred sixty-one".