1561472 has 32 divisors (see below), whose sum is σ = 3396600. Its totient is φ = 709120.

The previous prime is 1561463. The next prime is 1561499. The reversal of 1561472 is 2741651.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854 + ... + 1962.

2^1561472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1561472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1698300).

1561472 is an abundant number, since it is smaller than the sum of its proper divisors (1835128).

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

1561472 is a wasteful number, since it uses less digits than its factorization.

1561472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1122 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 1561472 is about 1249.5887323436. The cubic root of 1561472 is about 116.0142669729.

The spelling of 1561472 in words is "one million, five hundred sixty-one thousand, four hundred seventy-two".