1261404076 has 12 divisors (see below), whose sum is σ = 2213134560. Its totient is φ = 629079920.

The previous prime is 1261404071. The next prime is 1261404083. The reversal of 1261404076 is 6704041621.

It is a super-2 number, since 2×1261404076² = 3182280485898827552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1261404071) 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, 403780 + ... + 406891.

It is an arithmetic number, because the mean of its divisors is an integer number (184427880).

Almost surely, 2^1261404076 is an apocalyptic number.

It is an amenable number.

1261404076 is a deficient number, since it is larger than the sum of its proper divisors (951730484).

1261404076 is a wasteful number, since it uses less digits than its factorization.

1261404076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811064 (or 811062 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1261404076 is about 35516.2508719600. The cubic root of 1261404076 is about 1080.4833444651.

Adding to 1261404076 its reverse (6704041621), we get a palindrome (7965445697).

The spelling of 1261404076 in words is "one billion, two hundred sixty-one million, four hundred four thousand, seventy-six".