1261013416 has 16 divisors (see below), whose sum is σ = 2546277300. Its totient is φ = 582006144.

The previous prime is 1261013363. The next prime is 1261013459. The reversal of 1261013416 is 6143101621.

It can be written as a sum of positive squares in 2 ways, for example, as 1207284516 + 53728900 = 34746^2 + 7330^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6062461 + ... + 6062668.

Almost surely, 2^1261013416 is an apocalyptic number.

It is an amenable number.

1261013416 is an abundant number, since it is smaller than the sum of its proper divisors (1285263884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261013416 is a wasteful number, since it uses less digits than its factorization.

1261013416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12125148 (or 12125144 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1261013416 is about 35510.7507101723. The cubic root of 1261013416 is about 1080.3717901492.

The spelling of 1261013416 in words is "one billion, two hundred sixty-one million, thirteen thousand, four hundred sixteen".