124742591 has 4 divisors (see below), whose sum is σ = 124809912. Its totient is φ = 124675272.

The previous prime is 124742587. The next prime is 124742603. The reversal of 124742591 is 195247421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195247421 = 6719 ⋅29059.

It is a cyclic number.

It is not a de Polignac number, because 124742591 - 2² = 124742587 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 (124742521) 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, 30800 + ... + 34613.

It is an arithmetic number, because the mean of its divisors is an integer number (31202478).

Almost surely, 2^124742591 is an apocalyptic number.

124742591 is a deficient number, since it is larger than the sum of its proper divisors (67321).

124742591 is an equidigital number, since it uses as much as digits as its factorization.

124742591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67320.

The product of its digits is 20160, while the sum is 35.

The square root of 124742591 is about 11168.8222745283. The cubic root of 124742591 is about 499.6565521412.

The spelling of 124742591 in words is "one hundred twenty-four million, seven hundred forty-two thousand, five hundred ninety-one".