1261996228 has 12 divisors (see below), whose sum is σ = 2208880912. Its totient is φ = 630887400.

The previous prime is 1261996217. The next prime is 1261996247. The reversal of 1261996228 is 8226991621.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351 + ... + 50257.

Almost surely, 2^1261996228 is an apocalyptic number.

It is an amenable number.

1261996228 is a deficient number, since it is larger than the sum of its proper divisors (946884684).

1261996228 is a wasteful number, since it uses less digits than its factorization.

1261996228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55362 (or 55360 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 1261996228 is about 35524.5862467109. The cubic root of 1261996228 is about 1080.6523916125.

The spelling of 1261996228 in words is "one billion, two hundred sixty-one million, nine hundred ninety-six thousand, two hundred twenty-eight".