1258397265 has 24 divisors (see below), whose sum is σ = 2124992448. Its totient is φ = 635819040.

The previous prime is 1258397263. The next prime is 1258397299. The reversal of 1258397265 is 5627938521.

It is not a de Polignac number, because 1258397265 - 2¹ = 1258397263 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1258397263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110781 + ... + 121610.

It is an arithmetic number, because the mean of its divisors is an integer number (88541352).

Almost surely, 2^1258397265 is an apocalyptic number.

1258397265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1258397265 is a deficient number, since it is larger than the sum of its proper divisors (866595183).

1258397265 is a wasteful number, since it uses less digits than its factorization.

1258397265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232437 (or 232418 counting only the distinct ones).

The product of its digits is 907200, while the sum is 48.

The square root of 1258397265 is about 35473.8955430610. The cubic root of 1258397265 is about 1079.6241447609.

The spelling of 1258397265 in words is "one billion, two hundred fifty-eight million, three hundred ninety-seven thousand, two hundred sixty-five".