1291270 has 8 divisors (see below), whose sum is σ = 2324304. Its totient is φ = 516504.

The previous prime is 1291249. The next prime is 1291271. The reversal of 1291270 is 721921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291271) 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, 64554 + ... + 64573.

It is an arithmetic number, because the mean of its divisors is an integer number (290538).

2^1291270 is an apocalyptic number.

1291270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291270 is a deficient number, since it is larger than the sum of its proper divisors (1033034).

1291270 is a wasteful number, since it uses less digits than its factorization.

1291270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129134.

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

The square root of 1291270 is about 1136.3406179487. The cubic root of 1291270 is about 108.8944352922.

It can be divided in two parts, 12912 and 70, that multiplied together give a triangular number (903840 = T₁₃₄₄).

The spelling of 1291270 in words is "one million, two hundred ninety-one thousand, two hundred seventy".