1251313214 has 4 divisors (see below), whose sum is σ = 1876969824. Its totient is φ = 625656606.

The previous prime is 1251313213. The next prime is 1251313223. The reversal of 1251313214 is 4123131521.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1251313214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251313213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312828302 + ... + 312828305.

It is an arithmetic number, because the mean of its divisors is an integer number (469242456).

Almost surely, 2^1251313214 is an apocalyptic number.

1251313214 is a deficient number, since it is larger than the sum of its proper divisors (625656610).

1251313214 is an equidigital number, since it uses as much as digits as its factorization.

1251313214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625656609.

The product of its digits is 720, while the sum is 23.

The square root of 1251313214 is about 35373.9058346686. The cubic root of 1251313214 is about 1077.5944441632.

Adding to 1251313214 its reverse (4123131521), we get a palindrome (5374444735).

The spelling of 1251313214 in words is "one billion, two hundred fifty-one million, three hundred thirteen thousand, two hundred fourteen".