1272399 has 16 divisors (see below), whose sum is σ = 1830240. Its totient is φ = 783360.

The previous prime is 1272379. The next prime is 1272409. The reversal of 1272399 is 9932721.

It is not a de Polignac number, because 1272399 - 2⁵ = 1272367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2907 + ... + 3315.

It is an arithmetic number, because the mean of its divisors is an integer number (114390).

2^1272399 is an apocalyptic number.

1272399 is a deficient number, since it is larger than the sum of its proper divisors (557841).

1272399 is a wasteful number, since it uses less digits than its factorization.

1272399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490.

The product of its digits is 6804, while the sum is 33.

The square root of 1272399 is about 1128.0066489166. The cubic root of 1272399 is about 108.3613581671.

It can be divided in two parts, 1272 and 399, that multiplied together give a triangular number (507528 = T₁₀₀₇).

The spelling of 1272399 in words is "one million, two hundred seventy-two thousand, three hundred ninety-nine".