1272913 has 2 divisors, whose sum is σ = 1272914. Its totient is φ = 1272912.

The previous prime is 1272899. The next prime is 1272917. The reversal of 1272913 is 3192721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1272384 + 529 = 1128^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 1272913 - 2⁵ = 1272881 is a prime.

It is equal to p₉₈₁₁₆ and since 1272913 and 98116 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (1272917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636456 + 636457.

It is an arithmetic number, because the mean of its divisors is an integer number (636457).

2^1272913 is an apocalyptic number.

It is an amenable number.

1272913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1272913 is an equidigital number, since it uses as much as digits as its factorization.

1272913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 1272913 is about 1128.2344614485. The cubic root of 1272913 is about 108.3759474691.

The spelling of 1272913 in words is "one million, two hundred seventy-two thousand, nine hundred thirteen".