1265401033 has 8 divisors (see below), whose sum is σ = 1394431808. Its totient is φ = 1140897744.

The previous prime is 1265401013. The next prime is 1265401057. The reversal of 1265401033 is 3301045621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265401033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1265400989 and 1265401007.

It is not an unprimeable number, because it can be changed into a prime (1265401013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131285 + ... + 1132402.

It is an arithmetic number, because the mean of its divisors is an integer number (174303976).

Almost surely, 2^1265401033 is an apocalyptic number.

1265401033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1265401033 is a deficient number, since it is larger than the sum of its proper divisors (129030775).

1265401033 is a wasteful number, since it uses less digits than its factorization.

1265401033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263743.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1265401033 is about 35572.4757783318. The cubic root of 1265401033 is about 1081.6233682757.

Adding to 1265401033 its reverse (3301045621), we get a palindrome (4566446654).

The spelling of 1265401033 in words is "one billion, two hundred sixty-five million, four hundred one thousand, thirty-three".