1260128916 has 36 divisors (see below), whose sum is σ = 3194979424. Its totient is φ = 418770000.

The previous prime is 1260128897. The next prime is 1260128939. The reversal of 1260128916 is 6198210621.

1260128916 is a `hidden beast` number, since 12 + 601 + 28 + 9 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40960 + ... + 64791.

Almost surely, 2^1260128916 is an apocalyptic number.

It is an amenable number.

1260128916 is an abundant number, since it is smaller than the sum of its proper divisors (1934850508).

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

1260128916 is a wasteful number, since it uses less digits than its factorization.

1260128916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106092 (or 106087 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1260128916 is about 35498.2945505837. The cubic root of 1260128916 is about 1080.1191329487.

The spelling of 1260128916 in words is "one billion, two hundred sixty million, one hundred twenty-eight thousand, nine hundred sixteen".