1255359261 has 8 divisors (see below), whose sum is σ = 1802567200. Its totient is φ = 772528752.

The previous prime is 1255359233. The next prime is 1255359269. The reversal of 1255359261 is 1629535521.

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

It is not a de Polignac number, because 1255359261 - 2⁹ = 1255358749 is a prime.

It is a super-2 number, since 2×1255359261² = 3151853748356932242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 32188699 = 1255359261 / (1 + 2 + 5 + 5 + 3 + 5 + 9 + 2 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255359269) 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, 16094311 + ... + 16094388.

It is an arithmetic number, because the mean of its divisors is an integer number (225320900).

Almost surely, 2^1255359261 is an apocalyptic number.

It is an amenable number.

1255359261 is a deficient number, since it is larger than the sum of its proper divisors (547207939).

1255359261 is a wasteful number, since it uses less digits than its factorization.

1255359261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32188715.

The product of its digits is 81000, while the sum is 39.

The square root of 1255359261 is about 35431.0493917411. The cubic root of 1255359261 is about 1078.7546404748.

The spelling of 1255359261 in words is "one billion, two hundred fifty-five million, three hundred fifty-nine thousand, two hundred sixty-one".