1248661265 has 16 divisors (see below), whose sum is σ = 1551225600. Its totient is φ = 963759552.

The previous prime is 1248661259. The next prime is 1248661279. The reversal of 1248661265 is 5621668421.

It is not a de Polignac number, because 1248661265 - 2⁸ = 1248661009 is a prime.

It is a super-2 number, since 2×1248661265² = 3118309909422800450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270164 + ... + 274746.

It is an arithmetic number, because the mean of its divisors is an integer number (96951600).

Almost surely, 2^1248661265 is an apocalyptic number.

It is an amenable number.

1248661265 is a deficient number, since it is larger than the sum of its proper divisors (302564335).

1248661265 is a wasteful number, since it uses less digits than its factorization.

1248661265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6496.

The product of its digits is 138240, while the sum is 41.

The square root of 1248661265 is about 35336.4014155375. The cubic root of 1248661265 is about 1076.8326453637.

The spelling of 1248661265 in words is "one billion, two hundred forty-eight million, six hundred sixty-one thousand, two hundred sixty-five".