1039426561 has 4 divisors (see below), whose sum is σ = 1039730692. Its totient is φ = 1039122432.

The previous prime is 1039426523. The next prime is 1039426567. The reversal of 1039426561 is 1656249301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134560000 + 904866561 = 11600^2 + 30081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039426561 - 2⁷ = 1039426433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1039426561.

It is not an unprimeable number, because it can be changed into a prime (1039426567) 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, 146880 + ... + 153793.

It is an arithmetic number, because the mean of its divisors is an integer number (259932673).

Almost surely, 2^1039426561 is an apocalyptic number.

It is an amenable number.

1039426561 is a deficient number, since it is larger than the sum of its proper divisors (304131).

1039426561 is an equidigital number, since it uses as much as digits as its factorization.

1039426561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304130.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 1039426561 is about 32240.1389730255. The cubic root of 1039426561 is about 1012.9731564067.

The spelling of 1039426561 in words is "one billion, thirty-nine million, four hundred twenty-six thousand, five hundred sixty-one".