1246653491 has 2 divisors, whose sum is σ = 1246653492. Its totient is φ = 1246653490.

The previous prime is 1246653481. The next prime is 1246653533. The reversal of 1246653491 is 1943566421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1246653491 - 2¹⁴ = 1246637107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1246653481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623326745 + 623326746.

It is an arithmetic number, because the mean of its divisors is an integer number (623326746).

Almost surely, 2^1246653491 is an apocalyptic number.

1246653491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246653491 is an equidigital number, since it uses as much as digits as its factorization.

1246653491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 41.

The square root of 1246653491 is about 35307.9805568090. The cubic root of 1246653491 is about 1076.2551745171.

The spelling of 1246653491 in words is "one billion, two hundred forty-six million, six hundred fifty-three thousand, four hundred ninety-one".