1265361223 has 8 divisors (see below), whose sum is σ = 1446952448. Its totient is φ = 1083976344.

The previous prime is 1265361211. The next prime is 1265361233. The reversal of 1265361223 is 3221635621.

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 1265361223 - 2⁵ = 1265361191 is a prime.

It is a super-2 number, since 2×1265361223² = 3202278049344111458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265361233) 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, 38211 + ... + 63172.

It is an arithmetic number, because the mean of its divisors is an integer number (180869056).

Almost surely, 2^1265361223 is an apocalyptic number.

1265361223 is a deficient number, since it is larger than the sum of its proper divisors (181591225).

1265361223 is a wasteful number, since it uses less digits than its factorization.

1265361223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103173.

The product of its digits is 12960, while the sum is 31.

The square root of 1265361223 is about 35571.9162120907. The cubic root of 1265361223 is about 1081.6120253953.

Adding to 1265361223 its reverse (3221635621), we get a palindrome (4486996844).

The spelling of 1265361223 in words is "one billion, two hundred sixty-five million, three hundred sixty-one thousand, two hundred twenty-three".