1561136 has 10 divisors (see below), whose sum is σ = 3024732. Its totient is φ = 780560.

The previous prime is 1561123. The next prime is 1561139. The reversal of 1561136 is 6311651.

It is a happy number.

It is a super-2 number, since 2×1561136² = 4874291220992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1561139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48770 + ... + 48801.

2^1561136 is an apocalyptic number.

1561136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1561136 is a deficient number, since it is larger than the sum of its proper divisors (1463596).

1561136 is an equidigital number, since it uses as much as digits as its factorization.

1561136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97579 (or 97573 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 1561136 is about 1249.4542808763. The cubic root of 1561136 is about 116.0059449985.

Adding to 1561136 its reverse (6311651), we get a palindrome (7872787).

The spelling of 1561136 in words is "one million, five hundred sixty-one thousand, one hundred thirty-six".