1251265223 has 8 divisors (see below), whose sum is σ = 1383936288. Its totient is φ = 1123797024.

The previous prime is 1251265219. The next prime is 1251265241. The reversal of 1251265223 is 3225621521.

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 1251265223 - 2² = 1251265219 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 (1251265423) 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, 1300211 + ... + 1301172.

It is an arithmetic number, because the mean of its divisors is an integer number (172992036).

Almost surely, 2^1251265223 is an apocalyptic number.

1251265223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1251265223 is a deficient number, since it is larger than the sum of its proper divisors (132671065).

1251265223 is a wasteful number, since it uses less digits than its factorization.

1251265223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2601433.

The product of its digits is 7200, while the sum is 29.

The square root of 1251265223 is about 35373.2274891619. The cubic root of 1251265223 is about 1077.5806678372.

Adding to 1251265223 its reverse (3225621521), we get a palindrome (4476886744).

The spelling of 1251265223 in words is "one billion, two hundred fifty-one million, two hundred sixty-five thousand, two hundred twenty-three".