1521434040 has 128 divisors (see below), whose sum is σ = 5523240960. Its totient is φ = 327297024.

The previous prime is 1521434021. The next prime is 1521434069. The reversal of 1521434040 is 404341251.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1521434040.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 38992 + ... + 67551.

It is an arithmetic number, because the mean of its divisors is an integer number (43150320).

Almost surely, 2^1521434040 is an apocalyptic number.

1521434040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1521434040 is an abundant number, since it is smaller than the sum of its proper divisors (4001806920).

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

1521434040 is a wasteful number, since it uses less digits than its factorization.

1521434040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106581 (or 106577 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1521434040 is about 39005.5642184548. The cubic root of 1521434040 is about 1150.1408875909.

Adding to 1521434040 its reverse (404341251), we get a palindrome (1925775291).

The spelling of 1521434040 in words is "one billion, five hundred twenty-one million, four hundred thirty-four thousand, forty".