1461391 has 2 divisors, whose sum is σ = 1461392. Its totient is φ = 1461390.

The previous prime is 1461367. The next prime is 1461401. The reversal of 1461391 is 1931641.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1461391 - 2⁵ = 1461359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1461301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 730695 + 730696.

It is an arithmetic number, because the mean of its divisors is an integer number (730696).

2^1461391 is an apocalyptic number.

1461391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1461391 is an equidigital number, since it uses as much as digits as its factorization.

1461391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 1461391 is about 1208.8800602210. The cubic root of 1461391 is about 113.4807357318.

The spelling of 1461391 in words is "one million, four hundred sixty-one thousand, three hundred ninety-one".