1265144053 has 12 divisors (see below), whose sum is σ = 1314164800. Its totient is φ = 1217892816.

The previous prime is 1265144009. The next prime is 1265144113. The reversal of 1265144053 is 3504415621.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1265144053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265144653) 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, 306598 + ... + 310696.

Almost surely, 2^1265144053 is an apocalyptic number.

It is an amenable number.

1265144053 is a deficient number, since it is larger than the sum of its proper divisors (49020747).

1265144053 is an equidigital number, since it uses as much as digits as its factorization.

1265144053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524 (or 4495 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 1265144053 is about 35568.8635325898. The cubic root of 1265144053 is about 1081.5501439555.

Adding to 1265144053 its reverse (3504415621), we get a palindrome (4769559674).

The spelling of 1265144053 in words is "one billion, two hundred sixty-five million, one hundred forty-four thousand, fifty-three".