1265646053 has 8 divisors (see below), whose sum is σ = 1448990400. Its totient is φ = 1082936160.

The previous prime is 1265646037. The next prime is 1265646113. The reversal of 1265646053 is 3506465621.

It is a happy number.

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 1265646053 - 2⁴ = 1265646037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1265645998 and 1265646016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265646253) 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, 154328 + ... + 162321.

It is an arithmetic number, because the mean of its divisors is an integer number (181123800).

Almost surely, 2^1265646053 is an apocalyptic number.

It is an amenable number.

1265646053 is a deficient number, since it is larger than the sum of its proper divisors (183344347).

1265646053 is an equidigital number, since it uses as much as digits as its factorization.

1265646053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317227.

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 1265646053 is about 35575.9195664708. The cubic root of 1265646053 is about 1081.6931754613.

The spelling of 1265646053 in words is "one billion, two hundred sixty-five million, six hundred forty-six thousand, fifty-three".