1261900896 has 48 divisors (see below), whose sum is σ = 3426721200. Its totient is φ = 406128128.

The previous prime is 1261900883. The next prime is 1261900943. The reversal of 1261900896 is 6980091621.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223851 + ... + 229418.

It is an arithmetic number, because the mean of its divisors is an integer number (71390025).

Almost surely, 2^1261900896 is an apocalyptic number.

1261900896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1261900896 is an abundant number, since it is smaller than the sum of its proper divisors (2164820304).

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

1261900896 is a wasteful number, since it uses less digits than its factorization.

1261900896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453311 (or 453303 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The square root of 1261900896 is about 35523.2444464185. The cubic root of 1261900896 is about 1080.6251798703.

The spelling of 1261900896 in words is "one billion, two hundred sixty-one million, nine hundred thousand, eight hundred ninety-six".