1251265222 has 8 divisors (see below), whose sum is σ = 1877558400. Its totient is φ = 625412424.

The previous prime is 1251265219. The next prime is 1251265241. The reversal of 1251265222 is 2225621521.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102897 + ... + 114412.

It is an arithmetic number, because the mean of its divisors is an integer number (234694800).

Almost surely, 2^1251265222 is an apocalyptic number.

1251265222 is a deficient number, since it is larger than the sum of its proper divisors (626293178).

1251265222 is a wasteful number, since it uses less digits than its factorization.

1251265222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220190.

The product of its digits is 4800, while the sum is 28.

The square root of 1251265222 is about 35373.2274750269. The cubic root of 1251265222 is about 1077.5806675502.

Adding to 1251265222 its reverse (2225621521), we get a palindrome (3476886743).

The spelling of 1251265222 in words is "one billion, two hundred fifty-one million, two hundred sixty-five thousand, two hundred twenty-two".