1272013199 has 4 divisors (see below), whose sum is σ = 1274737464. Its totient is φ = 1269288936.

The previous prime is 1272013177. The next prime is 1272013231. The reversal of 1272013199 is 9913102721.

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

It is a cyclic number.

It is not a de Polignac number, because 1272013199 - 2⁸ = 1272012943 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 (1272013139) 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, 1361432 + ... + 1362365.

It is an arithmetic number, because the mean of its divisors is an integer number (318684366).

Almost surely, 2^1272013199 is an apocalyptic number.

1272013199 is a deficient number, since it is larger than the sum of its proper divisors (2724265).

1272013199 is an equidigital number, since it uses as much as digits as its factorization.

1272013199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2724264.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 1272013199 is about 35665.2940405655. The cubic root of 1272013199 is about 1083.5040506556.

The spelling of 1272013199 in words is "one billion, two hundred seventy-two million, thirteen thousand, one hundred ninety-nine".