1222712507 has 4 divisors (see below), whose sum is σ = 1223046936. Its totient is φ = 1222378080.

The previous prime is 1222712503. The next prime is 1222712581. The reversal of 1222712507 is 7052172221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7052172221 = 19 ⋅371166959.

It is a cyclic number.

It is not a de Polignac number, because 1222712507 - 2² = 1222712503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1222712507.

It is not an unprimeable number, because it can be changed into a prime (1222712503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161669 + ... + 169062.

It is an arithmetic number, because the mean of its divisors is an integer number (305761734).

Almost surely, 2^1222712507 is an apocalyptic number.

1222712507 is a deficient number, since it is larger than the sum of its proper divisors (334429).

1222712507 is an equidigital number, since it uses as much as digits as its factorization.

1222712507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334428.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 1222712507 is about 34967.3062588470. The cubic root of 1222712507 is about 1069.3210550008.

Adding to 1222712507 its reverse (7052172221), we get a palindrome (8274884728).

The spelling of 1222712507 in words is "one billion, two hundred twenty-two million, seven hundred twelve thousand, five hundred seven".