124139297 has 4 divisors (see below), whose sum is σ = 124681620. Its totient is φ = 123596976.

The previous prime is 124139291. The next prime is 124139317. The reversal of 124139297 is 792931421.

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 109077136 + 15062161 = 10444^2 + 3881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124139297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124139297.

It is not an unprimeable number, because it can be changed into a prime (124139291) 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, 270818 + ... + 271275.

It is an arithmetic number, because the mean of its divisors is an integer number (31170405).

Almost surely, 2^124139297 is an apocalyptic number.

It is an amenable number.

124139297 is a deficient number, since it is larger than the sum of its proper divisors (542323).

124139297 is an equidigital number, since it uses as much as digits as its factorization.

124139297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542322.

The product of its digits is 27216, while the sum is 38.

The square root of 124139297 is about 11141.7815900331. The cubic root of 124139297 is about 498.8497518877.

The spelling of 124139297 in words is "one hundred twenty-four million, one hundred thirty-nine thousand, two hundred ninety-seven".