124717391 has 4 divisors (see below), whose sum is σ = 126118800. Its totient is φ = 123315984.

The previous prime is 124717363. The next prime is 124717421. The reversal of 124717391 is 193717421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193717421 = 1163 ⋅166567.

It is a cyclic number.

It is not a de Polignac number, because 124717391 - 2¹⁴ = 124701007 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 (124717591) 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, 700571 + ... + 700748.

It is an arithmetic number, because the mean of its divisors is an integer number (31529700).

Almost surely, 2^124717391 is an apocalyptic number.

124717391 is a deficient number, since it is larger than the sum of its proper divisors (1401409).

124717391 is an equidigital number, since it uses as much as digits as its factorization.

124717391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401408.

The product of its digits is 10584, while the sum is 35.

The square root of 124717391 is about 11167.6940771137. The cubic root of 124717391 is about 499.6229036682.

The spelling of 124717391 in words is "one hundred twenty-four million, seven hundred seventeen thousand, three hundred ninety-one".