1261259488 has 24 divisors (see below), whose sum is σ = 2540854008. Its totient is φ = 615963264.

The previous prime is 1261259477. The next prime is 1261259551. The reversal of 1261259488 is 8849521621.

It is a congruent number.

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, 456931 + ... + 459682.

It is an arithmetic number, because the mean of its divisors is an integer number (105868917).

Almost surely, 2^1261259488 is an apocalyptic number.

It is an amenable number.

1261259488 is an abundant number, since it is smaller than the sum of its proper divisors (1279594520).

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

1261259488 is an equidigital number, since it uses as much as digits as its factorization.

1261259488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916666 (or 916658 counting only the distinct ones).

The product of its digits is 276480, while the sum is 46.

The square root of 1261259488 is about 35514.2152947239. The cubic root of 1261259488 is about 1080.4420595461.

The spelling of 1261259488 in words is "one billion, two hundred sixty-one million, two hundred fifty-nine thousand, four hundred eighty-eight".