1261560424 has 8 divisors (see below), whose sum is σ = 2365425810. Its totient is φ = 630780208.

The previous prime is 1261560413. The next prime is 1261560427. The reversal of 1261560424 is 4240651621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1252452100 + 9108324 = 35390^2 + 3018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1261560427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78847519 + ... + 78847534.

Almost surely, 2^1261560424 is an apocalyptic number.

It is an amenable number.

1261560424 is a deficient number, since it is larger than the sum of its proper divisors (1103865386).

1261560424 is a wasteful number, since it uses less digits than its factorization.

1261560424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157695059 (or 157695055 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1261560424 is about 35518.4518806775. The cubic root of 1261560424 is about 1080.5279837244.

The spelling of 1261560424 in words is "one billion, two hundred sixty-one million, five hundred sixty thousand, four hundred twenty-four".