1521481540 has 24 divisors (see below), whose sum is σ = 3235559040. Its totient is φ = 600888288.

The previous prime is 1521481529. The next prime is 1521481541. The reversal of 1521481540 is 451841251.

It is not an unprimeable number, because it can be changed into a prime (1521481541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479902 + ... + 483061.

It is an arithmetic number, because the mean of its divisors is an integer number (134814960).

Almost surely, 2^1521481540 is an apocalyptic number.

1521481540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1521481540 is an abundant number, since it is smaller than the sum of its proper divisors (1714077500).

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

1521481540 is a wasteful number, since it uses less digits than its factorization.

1521481540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963051 (or 963049 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1521481540 is about 39006.1731011900. The cubic root of 1521481540 is about 1150.1528568082.

The spelling of 1521481540 in words is "one billion, five hundred twenty-one million, four hundred eighty-one thousand, five hundred forty".