1291207 has 4 divisors (see below), whose sum is σ = 1294696. Its totient is φ = 1287720.

The previous prime is 1291193. The next prime is 1291211. The reversal of 1291207 is 7021921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7021921 = 233 ⋅30137.

It is a cyclic number.

It is not a de Polignac number, because 1291207 - 2⁷ = 1291079 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 (1291217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (323674).

2^1291207 is an apocalyptic number.

1291207 is a deficient number, since it is larger than the sum of its proper divisors (3489).

1291207 is an equidigital number, since it uses as much as digits as its factorization.

1291207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1291207 is about 1136.3128970490. The cubic root of 1291207 is about 108.8926643068.

It can be divided in two parts, 129120 and 7, that multiplied together give a triangular number (903840 = T₁₃₄₄).

The spelling of 1291207 in words is "one million, two hundred ninety-one thousand, two hundred seven".