1265226557 has 8 divisors (see below), whose sum is σ = 1447610496. Its totient is φ = 1083251952.

The previous prime is 1265226553. The next prime is 1265226563. The reversal of 1265226557 is 7556225621.

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 1265226557 - 2² = 1265226553 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 (1265226553) 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, 95678 + ... + 108095.

It is an arithmetic number, because the mean of its divisors is an integer number (180951312).

Almost surely, 2^1265226557 is an apocalyptic number.

It is an amenable number.

1265226557 is a deficient number, since it is larger than the sum of its proper divisors (182383939).

1265226557 is an equidigital number, since it uses as much as digits as its factorization.

1265226557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204667.

The product of its digits is 252000, while the sum is 41.

The square root of 1265226557 is about 35570.0232920925. The cubic root of 1265226557 is about 1081.5736538668.

The spelling of 1265226557 in words is "one billion, two hundred sixty-five million, two hundred twenty-six thousand, five hundred fifty-seven".