142009656541 has 4 divisors (see below), whose sum is σ = 142110445500. Its totient is φ = 141908867584.

The previous prime is 142009656527. The next prime is 142009656557. The reversal of 142009656541 is 145656900241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145656900241 = 8293 ⋅17563837.

It can be written as a sum of positive squares in 2 ways, for example, as 35312047225 + 106697609316 = 187915^2 + 326646^2 .

It is a cyclic number.

It is not a de Polignac number, because 142009656541 - 2³⁷ = 4570703069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142009656641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50392366 + ... + 50395183.

It is an arithmetic number, because the mean of its divisors is an integer number (35527611375).

Almost surely, 2^142009656541 is an apocalyptic number.

It is an amenable number.

142009656541 is a deficient number, since it is larger than the sum of its proper divisors (100788959).

142009656541 is a wasteful number, since it uses less digits than its factorization.

142009656541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100788958.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 142009656541 in words is "one hundred forty-two billion, nine million, six hundred fifty-six thousand, five hundred forty-one".