1261255598 has 8 divisors (see below), whose sum is σ = 1895043600. Its totient is φ = 629574400.

The previous prime is 1261255591. The next prime is 1261255609. The reversal of 1261255598 is 8955521621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261255591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525203 + ... + 527598.

It is an arithmetic number, because the mean of its divisors is an integer number (236880450).

Almost surely, 2^1261255598 is an apocalyptic number.

1261255598 is a deficient number, since it is larger than the sum of its proper divisors (633788002).

1261255598 is a wasteful number, since it uses less digits than its factorization.

1261255598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053402.

The product of its digits is 216000, while the sum is 44.

The square root of 1261255598 is about 35514.1605278796. The cubic root of 1261255598 is about 1080.4409487718.

The spelling of 1261255598 in words is "one billion, two hundred sixty-one million, two hundred fifty-five thousand, five hundred ninety-eight".