1298655855 has 32 divisors (see below), whose sum is σ = 2638540800. Its totient is φ = 593670816.

The previous prime is 1298655803. The next prime is 1298655863. The reversal of 1298655855 is 5585568921.

1298655855 is a `hidden beast` number, since 1 + 2 + 9 + 86 + 558 + 5 + 5 = 666.

It is not a de Polignac number, because 1298655855 - 2¹⁰ = 1298654831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 686175 + ... + 688064.

It is an arithmetic number, because the mean of its divisors is an integer number (82454400).

Almost surely, 2^1298655855 is an apocalyptic number.

1298655855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1298655855 is an abundant number, since it is smaller than the sum of its proper divisors (1339884945).

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

1298655855 is a wasteful number, since it uses less digits than its factorization.

1298655855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374260 (or 1374254 counting only the distinct ones).

The product of its digits is 4320000, while the sum is 54.

The square root of 1298655855 is about 36036.8679965393. The cubic root of 1298655855 is about 1091.0166019895.

The spelling of 1298655855 in words is "one billion, two hundred ninety-eight million, six hundred fifty-five thousand, eight hundred fifty-five".