124421520 has 80 divisors (see below), whose sum is σ = 387332352. Its totient is φ = 33039360.

The previous prime is 124421483. The next prime is 124421533. The reversal of 124421520 is 25124421.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×124421520² = 30961429278220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64084 + ... + 65996.

Almost surely, 2^124421520 is an apocalyptic number.

124421520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124421520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193666176).

124421520 is an abundant number, since it is smaller than the sum of its proper divisors (262910832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124421520 is a wasteful number, since it uses less digits than its factorization.

124421520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 124421520 is about 11154.4394749355. The cubic root of 124421520 is about 499.2275004368.

Adding to 124421520 its reverse (25124421), we get a palindrome (149545941).

The spelling of 124421520 in words is "one hundred twenty-four million, four hundred twenty-one thousand, five hundred twenty".