1255724591 has 8 divisors (see below), whose sum is σ = 1382005584. Its totient is φ = 1131464320.

The previous prime is 1255724579. The next prime is 1255724593. The reversal of 1255724591 is 1954275521.

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 1255724591 - 2¹⁸ = 1255462447 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 (1255724593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 503876 + ... + 506361.

It is an arithmetic number, because the mean of its divisors is an integer number (172750698).

Almost surely, 2^1255724591 is an apocalyptic number.

1255724591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1255724591 is a deficient number, since it is larger than the sum of its proper divisors (126280993).

1255724591 is a wasteful number, since it uses less digits than its factorization.

1255724591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010361.

The product of its digits is 126000, while the sum is 41.

The square root of 1255724591 is about 35436.2045230581. The cubic root of 1255724591 is about 1078.8592753846.

The spelling of 1255724591 in words is "one billion, two hundred fifty-five million, seven hundred twenty-four thousand, five hundred ninety-one".