1521412540 has 12 divisors (see below), whose sum is σ = 3194966376. Its totient is φ = 608565008.

The previous prime is 1521412447. The next prime is 1521412589. The reversal of 1521412540 is 452141251.

It is a super-2 number, since 2×1521412540² = 4629392233738503200, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 38035294 + ... + 38035333.

It is an arithmetic number, because the mean of its divisors is an integer number (266247198).

Almost surely, 2^1521412540 is an apocalyptic number.

1521412540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1521412540 is an abundant number, since it is smaller than the sum of its proper divisors (1673553836).

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

1521412540 is a wasteful number, since it uses less digits than its factorization.

1521412540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76070636 (or 76070634 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1521412540 is about 39005.2886157762. The cubic root of 1521412540 is about 1150.1354698633.

Adding to 1521412540 its reverse (452141251), we get a palindrome (1973553791).

The spelling of 1521412540 in words is "one billion, five hundred twenty-one million, four hundred twelve thousand, five hundred forty".