1561266124 has 48 divisors (see below), whose sum is σ = 3028989600. Its totient is φ = 698227200.

The previous prime is 1561266089. The next prime is 1561266131. The reversal of 1561266124 is 4216621651.

It is a self number, because there is not a number n which added to its sum of digits gives 1561266124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895894 + ... + 897634.

It is an arithmetic number, because the mean of its divisors is an integer number (63103950).

Almost surely, 2^1561266124 is an apocalyptic number.

It is an amenable number.

1561266124 is a deficient number, since it is larger than the sum of its proper divisors (1467723476).

1561266124 is a wasteful number, since it uses less digits than its factorization.

1561266124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2072 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 1561266124 is about 39512.8602356246. The cubic root of 1561266124 is about 1160.0916802291.

Adding to 1561266124 its reverse (4216621651), we get a palindrome (5777887775).

The spelling of 1561266124 in words is "one billion, five hundred sixty-one million, two hundred sixty-six thousand, one hundred twenty-four".