1265235413 has 4 divisors (see below), whose sum is σ = 1362561228. Its totient is φ = 1167909600.

The previous prime is 1265235409. The next prime is 1265235463. The reversal of 1265235413 is 3145325621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3145325621 = 151 ⋅20829971.

It can be written as a sum of positive squares in 2 ways, for example, as 711715684 + 553519729 = 26678^2 + 23527^2 .

It is not a de Polignac number, because 1265235413 - 2² = 1265235409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265235413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265235463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48662888 + ... + 48662913.

It is an arithmetic number, because the mean of its divisors is an integer number (340640307).

Almost surely, 2^1265235413 is an apocalyptic number.

1265235413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1265235413 is a deficient number, since it is larger than the sum of its proper divisors (97325815).

1265235413 is an equidigital number, since it uses as much as digits as its factorization.

1265235413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97325814.

The product of its digits is 21600, while the sum is 32.

The square root of 1265235413 is about 35570.1477787203. The cubic root of 1265235413 is about 1081.5761773658.

The spelling of 1265235413 in words is "one billion, two hundred sixty-five million, two hundred thirty-five thousand, four hundred thirteen".