1261814428 has 24 divisors (see below), whose sum is σ = 2531709152. Its totient is φ = 539046144.

The previous prime is 1261814371. The next prime is 1261814473. The reversal of 1261814428 is 8244181621.

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, 63225 + ... + 80752.

Almost surely, 2^1261814428 is an apocalyptic number.

It is an amenable number.

1261814428 is an abundant number, since it is smaller than the sum of its proper divisors (1269894724).

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

1261814428 is a wasteful number, since it uses less digits than its factorization.

1261814428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144301 (or 144299 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 1261814428 is about 35522.0273633136. The cubic root of 1261814428 is about 1080.6004970993.

The spelling of 1261814428 in words is "one billion, two hundred sixty-one million, eight hundred fourteen thousand, four hundred twenty-eight".