1267916213 has 4 divisors (see below), whose sum is σ = 1308816768. Its totient is φ = 1227015660.

The previous prime is 1267916203. The next prime is 1267916233. The reversal of 1267916213 is 3126197621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1267916213 - 2¹⁰ = 1267915189 is a prime.

It is a super-2 number, since 2×1267916213² = 3215223046376522738, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267916203) 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, 20450231 + ... + 20450292.

It is an arithmetic number, because the mean of its divisors is an integer number (327204192).

Almost surely, 2^1267916213 is an apocalyptic number.

It is an amenable number.

1267916213 is a deficient number, since it is larger than the sum of its proper divisors (40900555).

1267916213 is an equidigital number, since it uses as much as digits as its factorization.

1267916213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40900554.

The product of its digits is 27216, while the sum is 38.

The square root of 1267916213 is about 35607.8111234038. The cubic root of 1267916213 is about 1082.3395251630.

The spelling of 1267916213 in words is "one billion, two hundred sixty-seven million, nine hundred sixteen thousand, two hundred thirteen".