1521040372 has 12 divisors (see below), whose sum is σ = 2753607780. Its totient is φ = 734295296.

The previous prime is 1521040357. The next prime is 1521040373. The reversal of 1521040372 is 2730401251.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 676208016 + 844832356 = 26004^2 + 29066^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521040373) 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, 6556093 + ... + 6556324.

It is an arithmetic number, because the mean of its divisors is an integer number (229467315).

Almost surely, 2^1521040372 is an apocalyptic number.

It is an amenable number.

1521040372 is a deficient number, since it is larger than the sum of its proper divisors (1232567408).

1521040372 is a wasteful number, since it uses less digits than its factorization.

1521040372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13112450 (or 13112448 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1521040372 is about 39000.5175863090. The cubic root of 1521040372 is about 1150.0416801529.

The spelling of 1521040372 in words is "one billion, five hundred twenty-one million, forty thousand, three hundred seventy-two".