1261746675 has 72 divisors (see below), whose sum is σ = 2607261696. Its totient is φ = 571331520.

The previous prime is 1261746667. The next prime is 1261746679. The reversal of 1261746675 is 5766471621.

It is not a de Polignac number, because 1261746675 - 2³ = 1261746667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1261746675.

It is not an unprimeable number, because it can be changed into a prime (1261746679) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 164782 + ... + 172268.

It is an arithmetic number, because the mean of its divisors is an integer number (36211968).

Almost surely, 2^1261746675 is an apocalyptic number.

1261746675 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1261746675 is an abundant number, since it is smaller than the sum of its proper divisors (1345515021).

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

1261746675 is a wasteful number, since it uses less digits than its factorization.

1261746675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7617 (or 7609 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 1261746675 is about 35521.0736746512. The cubic root of 1261746675 is about 1080.5811558411.

The spelling of 1261746675 in words is "one billion, two hundred sixty-one million, seven hundred forty-six thousand, six hundred seventy-five".