1260413561 has 12 divisors (see below), whose sum is σ = 1390716096. Its totient is φ = 1141444920.

The previous prime is 1260413527. The next prime is 1260413569. The reversal of 1260413561 is 1653140621.

It is a happy number.

It is not a de Polignac number, because 1260413561 - 2¹⁰ = 1260412537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1260413569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12020 + ... + 51626.

It is an arithmetic number, because the mean of its divisors is an integer number (115893008).

Almost surely, 2^1260413561 is an apocalyptic number.

1260413561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1260413561 is a deficient number, since it is larger than the sum of its proper divisors (130302535).

1260413561 is a wasteful number, since it uses less digits than its factorization.

1260413561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39892 (or 39881 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1260413561 is about 35502.3036013158. The cubic root of 1260413561 is about 1080.2004546188.

The spelling of 1260413561 in words is "one billion, two hundred sixty million, four hundred thirteen thousand, five hundred sixty-one".