1157265 has 12 divisors (see below), whose sum is σ = 2006004. Its totient is φ = 617184.

The previous prime is 1157263. The next prime is 1157279. The reversal of 1157265 is 5627511.

It can be written as a sum of positive squares in 2 ways, for example, as 553536 + 603729 = 744^2 + 777^2 .

It is not a de Polignac number, because 1157265 - 2¹ = 1157263 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1157263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12814 + ... + 12903.

It is an arithmetic number, because the mean of its divisors is an integer number (167167).

2^1157265 is an apocalyptic number.

1157265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1157265 is a deficient number, since it is larger than the sum of its proper divisors (848739).

1157265 is a wasteful number, since it uses less digits than its factorization.

1157265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25728 (or 25725 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 1157265 is about 1075.7625202618. The cubic root of 1157265 is about 104.9891145178.

The spelling of 1157265 in words is "one million, one hundred fifty-seven thousand, two hundred sixty-five".