1214565491 has 2 divisors, whose sum is σ = 1214565492. Its totient is φ = 1214565490.

The previous prime is 1214565383. The next prime is 1214565503. The reversal of 1214565491 is 1945654121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1214565491 - 2²² = 1210371187 is a prime.

It is a super-4 number, since 4×1214565491⁴ (a number of 37 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1214525491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607282745 + 607282746.

It is an arithmetic number, because the mean of its divisors is an integer number (607282746).

Almost surely, 2^1214565491 is an apocalyptic number.

1214565491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1214565491 is an equidigital number, since it uses as much as digits as its factorization.

1214565491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 1214565491 is about 34850.6167951157. The cubic root of 1214565491 is about 1066.9407743574.

The spelling of 1214565491 in words is "one billion, two hundred fourteen million, five hundred sixty-five thousand, four hundred ninety-one".