1261244460 has 96 divisors (see below), whose sum is σ = 4134477312. Its totient is φ = 281249280.

The previous prime is 1261244443. The next prime is 1261244471. The reversal of 1261244460 is 644421621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19402 + ... + 53841.

It is an arithmetic number, because the mean of its divisors is an integer number (43067472).

Almost surely, 2^1261244460 is an apocalyptic number.

1261244460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261244460 is an abundant number, since it is smaller than the sum of its proper divisors (2873232852).

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

1261244460 is a wasteful number, since it uses less digits than its factorization.

1261244460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73303 (or 73301 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1261244460 is about 35514.0037168439. The cubic root of 1261244460 is about 1080.4377683467.

The spelling of 1261244460 in words is "one billion, two hundred sixty-one million, two hundred forty-four thousand, four hundred sixty".