1405521132 has 12 divisors (see below), whose sum is σ = 3279549336. Its totient is φ = 468507040.

The previous prime is 1405521113. The next prime is 1405521133. The reversal of 1405521132 is 2311255041.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1405521132² = 3950979304997122848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1405521133) 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, 58563369 + ... + 58563392.

It is an arithmetic number, because the mean of its divisors is an integer number (273295778).

Almost surely, 2^1405521132 is an apocalyptic number.

1405521132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1405521132 is an abundant number, since it is smaller than the sum of its proper divisors (1874028204).

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

1405521132 is a wasteful number, since it uses less digits than its factorization.

1405521132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117126768 (or 117126766 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1405521132 is about 37490.2805004177. The cubic root of 1405521132 is about 1120.1575915578.

Adding to 1405521132 its reverse (2311255041), we get a palindrome (3716776173).

The spelling of 1405521132 in words is "one billion, four hundred five million, five hundred twenty-one thousand, one hundred thirty-two".