124247381 has 4 divisors (see below), whose sum is σ = 124320012. Its totient is φ = 124174752.

The previous prime is 124247377. The next prime is 124247393. The reversal of 124247381 is 183742421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183742421 = 103 ⋅1783907.

It can be written as a sum of positive squares in 2 ways, for example, as 67486225 + 56761156 = 8215^2 + 7534^2 .

It is a cyclic number.

It is not a de Polignac number, because 124247381 - 2² = 124247377 is a prime.

It is a super-2 number, since 2×124247381² = 30874823370718322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124247351) 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, 33686 + ... + 37191.

It is an arithmetic number, because the mean of its divisors is an integer number (31080003).

Almost surely, 2^124247381 is an apocalyptic number.

It is an amenable number.

124247381 is a deficient number, since it is larger than the sum of its proper divisors (72631).

124247381 is an equidigital number, since it uses as much as digits as its factorization.

124247381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72630.

The product of its digits is 10752, while the sum is 32.

The square root of 124247381 is about 11146.6309259794. The cubic root of 124247381 is about 498.9944872437.

The spelling of 124247381 in words is "one hundred twenty-four million, two hundred forty-seven thousand, three hundred eighty-one".