124220731 has 4 divisors (see below), whose sum is σ = 124269264. Its totient is φ = 124172200.

The previous prime is 124220713. The next prime is 124220741. The reversal of 124220731 is 137022421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137022421 = 227 ⋅603623.

It is a cyclic number.

It is not a de Polignac number, because 124220731 - 2⁹ = 124220219 is a prime.

It is a super-2 number, since 2×124220731² = 30861580020348722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124220741) 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, 20200 + ... + 25621.

It is an arithmetic number, because the mean of its divisors is an integer number (31067316).

Almost surely, 2^124220731 is an apocalyptic number.

124220731 is a deficient number, since it is larger than the sum of its proper divisors (48533).

124220731 is an equidigital number, since it uses as much as digits as its factorization.

124220731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48532.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 124220731 is about 11145.4354333960. The cubic root of 124220731 is about 498.9588080101.

The spelling of 124220731 in words is "one hundred twenty-four million, two hundred twenty thousand, seven hundred thirty-one".