124023521 has 12 divisors (see below), whose sum is σ = 131041092. Its totient is φ = 117359616.

The previous prime is 124023511. The next prime is 124023533. The reversal of 124023521 is 125320421.

It can be written as a sum of positive squares in 2 ways, for example, as 95550625 + 28472896 = 9775^2 + 5336^2 .

It is not a de Polignac number, because 124023521 - 2¹⁴ = 124007137 is a prime.

It is a super-2 number, since 2×124023521² = 30763667522474882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124023493 and 124023502.

It is not an unprimeable number, because it can be changed into a prime (124023511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50105 + ... + 52521.

It is an arithmetic number, because the mean of its divisors is an integer number (10920091).

Almost surely, 2^124023521 is an apocalyptic number.

It is an amenable number.

124023521 is a deficient number, since it is larger than the sum of its proper divisors (7017571).

124023521 is an equidigital number, since it uses as much as digits as its factorization.

124023521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 124023521 is about 11136.5847996592. The cubic root of 124023521 is about 498.6946229473.

Adding to 124023521 its reverse (125320421), we get a palindrome (249343942).

The spelling of 124023521 in words is "one hundred twenty-four million, twenty-three thousand, five hundred twenty-one".