1291493 has 6 divisors (see below), whose sum is σ = 1502406. Its totient is φ = 1106952.

The previous prime is 1291489. The next prime is 1291501. The reversal of 1291493 is 3941921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1044484 + 247009 = 1022^2 + 497^2 .

It is not a de Polignac number, because 1291493 - 2² = 1291489 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 (1291453) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13130 + ... + 13227.

It is an arithmetic number, because the mean of its divisors is an integer number (250401).

2^1291493 is an apocalyptic number.

It is an amenable number.

1291493 is a deficient number, since it is larger than the sum of its proper divisors (210913).

1291493 is an equidigital number, since it uses as much as digits as its factorization.

1291493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26371 (or 26364 counting only the distinct ones).

The product of its digits is 1944, while the sum is 29.

The square root of 1291493 is about 1136.4387357003. The cubic root of 1291493 is about 108.9007035555.

The spelling of 1291493 in words is "one million, two hundred ninety-one thousand, four hundred ninety-three".