1256550253 has 4 divisors (see below), whose sum is σ = 1436057440. Its totient is φ = 1077043068.

The previous prime is 1256550233. The next prime is 1256550259. The reversal of 1256550253 is 3520556521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3520556521 = 1453 ⋅2422957.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256550253 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 (1256550259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89753583 + ... + 89753596.

It is an arithmetic number, because the mean of its divisors is an integer number (359014360).

Almost surely, 2^1256550253 is an apocalyptic number.

It is an amenable number.

1256550253 is a deficient number, since it is larger than the sum of its proper divisors (179507187).

1256550253 is an equidigital number, since it uses as much as digits as its factorization.

1256550253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179507186.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 1256550253 is about 35447.8525865813. The cubic root of 1256550253 is about 1079.0956801800.

The spelling of 1256550253 in words is "one billion, two hundred fifty-six million, five hundred fifty thousand, two hundred fifty-three".