1255391293 has 8 divisors (see below), whose sum is σ = 1370480888. Its totient is φ = 1142947584.

The previous prime is 1255391227. The next prime is 1255391329. The reversal of 1255391293 is 3921935521.

It can be written as a sum of positive squares in 4 ways, for example, as 63968004 + 1191423289 = 7998^2 + 34517^2 .

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 1255391293 - 2¹⁷ = 1255260221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255391993) 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, 660480 + ... + 662377.

It is an arithmetic number, because the mean of its divisors is an integer number (171310111).

Almost surely, 2^1255391293 is an apocalyptic number.

1255391293 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1255391293 is a deficient number, since it is larger than the sum of its proper divisors (115089595).

1255391293 is a wasteful number, since it uses less digits than its factorization.

1255391293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322943.

The product of its digits is 72900, while the sum is 40.

The square root of 1255391293 is about 35431.5014217574. The cubic root of 1255391293 is about 1078.7638156371.

The spelling of 1255391293 in words is "one billion, two hundred fifty-five million, three hundred ninety-one thousand, two hundred ninety-three".