1561272 has 16 divisors (see below), whose sum is σ = 3903240. Its totient is φ = 520416.

The previous prime is 1561267. The next prime is 1561279. The reversal of 1561272 is 2721651.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 65053 = 1561272 / (1 + 5 + 6 + 1 + 2 + 7 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561279) 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, 32503 + ... + 32550.

2^1561272 is an apocalyptic number.

1561272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1561272 is an abundant number, since it is smaller than the sum of its proper divisors (2341968).

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

1561272 is a wasteful number, since it uses less digits than its factorization.

1561272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65062 (or 65058 counting only the distinct ones).

The product of its digits is 840, while the sum is 24.

The square root of 1561272 is about 1249.5087034511. The cubic root of 1561272 is about 116.0093135606.

The spelling of 1561272 in words is "one million, five hundred sixty-one thousand, two hundred seventy-two".