1255033561 has 8 divisors (see below), whose sum is σ = 1285273440. Its totient is φ = 1224841632.

The previous prime is 1255033553. The next prime is 1255033567. The reversal of 1255033561 is 1653305521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255033561 - 2³ = 1255033553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1255033567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44106 + ... + 66748.

It is an arithmetic number, because the mean of its divisors is an integer number (160659180).

Almost surely, 2^1255033561 is an apocalyptic number.

It is an amenable number.

1255033561 is a deficient number, since it is larger than the sum of its proper divisors (30239879).

1255033561 is a wasteful number, since it uses less digits than its factorization.

1255033561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23975.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1255033561 is about 35426.4528424735. The cubic root of 1255033561 is about 1078.6613389562.

The spelling of 1255033561 in words is "one billion, two hundred fifty-five million, thirty-three thousand, five hundred sixty-one".