1261130680 has 16 divisors (see below), whose sum is σ = 2837544120. Its totient is φ = 504452256.

The previous prime is 1261130677. The next prime is 1261130683. The reversal of 1261130680 is 860311621.

It is an interprime number because it is at equal distance from previous prime (1261130677) and next prime (1261130683).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261130683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15764094 + ... + 15764173.

Almost surely, 2^1261130680 is an apocalyptic number.

1261130680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261130680 is an abundant number, since it is smaller than the sum of its proper divisors (1576413440).

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

1261130680 is a wasteful number, since it uses less digits than its factorization.

1261130680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31528278 (or 31528274 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1261130680 is about 35512.4017774073. The cubic root of 1261130680 is about 1080.4052777102.

The spelling of 1261130680 in words is "one billion, two hundred sixty-one million, one hundred thirty thousand, six hundred eighty".