1521989534 has 32 divisors (see below), whose sum is σ = 2594410560. Its totient is φ = 664342272.

The previous prime is 1521989533. The next prime is 1521989543. The reversal of 1521989534 is 4359891251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521989533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38924 + ... + 67520.

It is an arithmetic number, because the mean of its divisors is an integer number (81075330).

Almost surely, 2^1521989534 is an apocalyptic number.

1521989534 is a deficient number, since it is larger than the sum of its proper divisors (1072421026).

1521989534 is a wasteful number, since it uses less digits than its factorization.

1521989534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28724.

The product of its digits is 388800, while the sum is 47.

The square root of 1521989534 is about 39012.6842706318. The cubic root of 1521989534 is about 1150.2808473493.

The spelling of 1521989534 in words is "one billion, five hundred twenty-one million, nine hundred eighty-nine thousand, five hundred thirty-four".