1265652490 has 8 divisors (see below), whose sum is σ = 2278174500. Its totient is φ = 506260992.

The previous prime is 1265652473. The next prime is 1265652503. The reversal of 1265652490 is 942565621.

It can be written as a sum of positive squares in 2 ways, for example, as 1085636601 + 180015889 = 32949^2 + 13417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 63282615 + ... + 63282634.

Almost surely, 2^1265652490 is an apocalyptic number.

1265652490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1265652490 is a deficient number, since it is larger than the sum of its proper divisors (1012522010).

1265652490 is a wasteful number, since it uses less digits than its factorization.

1265652490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126565256.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 1265652490 is about 35576.0100348535. The cubic root of 1265652490 is about 1081.6950092671.

The spelling of 1265652490 in words is "one billion, two hundred sixty-five million, six hundred fifty-two thousand, four hundred ninety".