1361491 has 2 divisors, whose sum is σ = 1361492. Its totient is φ = 1361490.

The previous prime is 1361471. The next prime is 1361497. The reversal of 1361491 is 1941631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361491 - 2⁷ = 1361363 is a prime.

It is not a weakly prime, because it can be changed into another prime (1361497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680745 + 680746.

It is an arithmetic number, because the mean of its divisors is an integer number (680746).

2^1361491 is an apocalyptic number.

1361491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361491 is an equidigital number, since it uses as much as digits as its factorization.

1361491 is an evil number, because the sum of its binary digits is even.

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

The square root of 1361491 is about 1166.8294648319. The cubic root of 1361491 is about 110.8336387326.

It can be divided in two parts, 13 and 61491, that added together give a square (61504 = 248²).

The spelling of 1361491 in words is "one million, three hundred sixty-one thousand, four hundred ninety-one".