1561412201 has 16 divisors (see below), whose sum is σ = 1650238464. Its totient is φ = 1474412544.

The previous prime is 1561412183. The next prime is 1561412207. The reversal of 1561412201 is 1022141651.

It is a cyclic number.

It is not a de Polignac number, because 1561412201 - 2¹⁰ = 1561411177 is a prime.

It is a super-2 number, since 2×1561412201² = 4876016122863328802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1561412207) 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 15 ways as a sum of consecutive naturals, for example, 1353641 + ... + 1354793.

It is an arithmetic number, because the mean of its divisors is an integer number (103139904).

Almost surely, 2^1561412201 is an apocalyptic number.

It is an amenable number.

1561412201 is a deficient number, since it is larger than the sum of its proper divisors (88826263).

1561412201 is a wasteful number, since it uses less digits than its factorization.

1561412201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1561412201 is about 39514.7086665206. The cubic root of 1561412201 is about 1160.1278597172.

Adding to 1561412201 its reverse (1022141651), we get a palindrome (2583553852).

The spelling of 1561412201 in words is "one billion, five hundred sixty-one million, four hundred twelve thousand, two hundred one".