1561332 has 24 divisors (see below), whose sum is σ = 3802176. Its totient is φ = 497728.

The previous prime is 1561303. The next prime is 1561337. The reversal of 1561332 is 2331651.

It is a super-2 number, since 2×1561332² = 4875515228448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1561299 and 1561308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2553 + ... + 3104.

It is an arithmetic number, because the mean of its divisors is an integer number (158424).

2^1561332 is an apocalyptic number.

1561332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561332 is an abundant number, since it is smaller than the sum of its proper divisors (2240844).

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

1561332 is a wasteful number, since it uses less digits than its factorization.

1561332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687 (or 5685 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 1561332 is about 1249.5327126570. The cubic root of 1561332 is about 116.0107996287.

Adding to 1561332 its reverse (2331651), we get a palindrome (3892983).

The spelling of 1561332 in words is "one million, five hundred sixty-one thousand, three hundred thirty-two".