1372040561 has 4 divisors (see below), whose sum is σ = 1372330212. Its totient is φ = 1371750912.

The previous prime is 1372040533. The next prime is 1372040587. The reversal of 1372040561 is 1650402731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1650402731 = 29 ⋅56910439.

It can be written as a sum of positive squares in 2 ways, for example, as 131239936 + 1240800625 = 11456^2 + 35225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372040561 - 2¹⁸ = 1371778417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1372040531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137600 + ... + 147233.

It is an arithmetic number, because the mean of its divisors is an integer number (343082553).

Almost surely, 2^1372040561 is an apocalyptic number.

It is an amenable number.

1372040561 is a deficient number, since it is larger than the sum of its proper divisors (289651).

1372040561 is an equidigital number, since it uses as much as digits as its factorization.

1372040561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289650.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 1372040561 is about 37041.0658728930. The cubic root of 1372040561 is about 1111.1916863675.

The spelling of 1372040561 in words is "one billion, three hundred seventy-two million, forty thousand, five hundred sixty-one".