1261132454 has 16 divisors (see below), whose sum is σ = 2072044800. Its totient is φ = 573009024.

The previous prime is 1261132447. The next prime is 1261132463. The reversal of 1261132454 is 4542311621.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638534 + ... + 640505.

It is an arithmetic number, because the mean of its divisors is an integer number (129502800).

Almost surely, 2^1261132454 is an apocalyptic number.

1261132454 is a deficient number, since it is larger than the sum of its proper divisors (810912346).

1261132454 is a wasteful number, since it uses less digits than its factorization.

1261132454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279087.

The product of its digits is 5760, while the sum is 29.

The square root of 1261132454 is about 35512.4267545883. The cubic root of 1261132454 is about 1080.4057843027.

The spelling of 1261132454 in words is "one billion, two hundred sixty-one million, one hundred thirty-two thousand, four hundred fifty-four".