124521431540 has 72 divisors (see below), whose sum is σ = 287768577096. Its totient is φ = 45226931200.

The previous prime is 124521431539. The next prime is 124521431557. The reversal of 124521431540 is 45134125421.

It can be written as a sum of positive squares in 4 ways, for example, as 82831142416 + 41690289124 = 287804^2 + 204182^2 .

It is a super-3 number, since 3×124521431540³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 124521431497 and 124521431506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2043920 + ... + 2103960.

It is an arithmetic number, because the mean of its divisors is an integer number (3996785793).

Almost surely, 2^124521431540 is an apocalyptic number.

124521431540 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 124521431540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143884288548).

124521431540 is an abundant number, since it is smaller than the sum of its proper divisors (163247145556).

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

124521431540 is a wasteful number, since it uses less digits than its factorization.

124521431540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60929 (or 60916 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 124521431540 its reverse (45134125421), we get a palindrome (169655556961).

The spelling of 124521431540 in words is "one hundred twenty-four billion, five hundred twenty-one million, four hundred thirty-one thousand, five hundred forty".