124894140521 has 4 divisors (see below), whose sum is σ = 124896719700. Its totient is φ = 124891561344.

The previous prime is 124894140517. The next prime is 124894140541. The reversal of 124894140521 is 125041498421.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8296477225 + 116597663296 = 91085^2 + 341464^2 .

It is a cyclic number.

It is not a de Polignac number, because 124894140521 - 2² = 124894140517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124894140541) 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, 1215536 + ... + 1314273.

It is an arithmetic number, because the mean of its divisors is an integer number (31224179925).

Almost surely, 2^124894140521 is an apocalyptic number.

It is an amenable number.

124894140521 is a deficient number, since it is larger than the sum of its proper divisors (2579179).

124894140521 is an equidigital number, since it uses as much as digits as its factorization.

124894140521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579178.

The product of its (nonzero) digits is 92160, while the sum is 41.

The spelling of 124894140521 in words is "one hundred twenty-four billion, eight hundred ninety-four million, one hundred forty thousand, five hundred twenty-one".