1561426059 has 16 divisors (see below), whose sum is σ = 2101196160. Its totient is φ = 1031334720.

The previous prime is 1561426049. The next prime is 1561426067. The reversal of 1561426059 is 9506241651.

It is not a de Polignac number, because 1561426059 - 2¹³ = 1561417867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1561426039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213664 + ... + 220850.

It is an arithmetic number, because the mean of its divisors is an integer number (131324760).

Almost surely, 2^1561426059 is an apocalyptic number.

1561426059 is a deficient number, since it is larger than the sum of its proper divisors (539770101).

1561426059 is a wasteful number, since it uses less digits than its factorization.

1561426059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 1561426059 is about 39514.8840185569. The cubic root of 1561426059 is about 1160.1312918676.

The spelling of 1561426059 in words is "one billion, five hundred sixty-one million, four hundred twenty-six thousand, fifty-nine".