1261258902 has 24 divisors (see below), whose sum is σ = 2733714984. Its totient is φ = 420267744.

The previous prime is 1261258897. The next prime is 1261258907. The reversal of 1261258902 is 2098521621.

1261258902 is a `hidden beast` number, since 12 + 61 + 2 + 589 + 0 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (1261258897) and next prime (1261258907).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261258907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45858 + ... + 68010.

It is an arithmetic number, because the mean of its divisors is an integer number (113904791).

Almost surely, 2^1261258902 is an apocalyptic number.

1261258902 is an abundant number, since it is smaller than the sum of its proper divisors (1472456082).

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

1261258902 is a wasteful number, since it uses less digits than its factorization.

1261258902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25324 (or 25321 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1261258902 is about 35514.2070445054. The cubic root of 1261258902 is about 1080.4418922162.

The spelling of 1261258902 in words is "one billion, two hundred sixty-one million, two hundred fifty-eight thousand, nine hundred two".