1246985651 has 2 divisors, whose sum is σ = 1246985652. Its totient is φ = 1246985650.

The previous prime is 1246985617. The next prime is 1246985653. The reversal of 1246985651 is 1565896421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1246985651 - 2²⁶ = 1179876787 is a prime.

Together with 1246985653, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1246985596 and 1246985605.

It is not a weakly prime, because it can be changed into another prime (1246985653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623492825 + 623492826.

It is an arithmetic number, because the mean of its divisors is an integer number (623492826).

Almost surely, 2^1246985651 is an apocalyptic number.

1246985651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1246985651 is an equidigital number, since it uses as much as digits as its factorization.

1246985651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The square root of 1246985651 is about 35312.6839959808. The cubic root of 1246985651 is about 1076.3507523116.

The spelling of 1246985651 in words is "one billion, two hundred forty-six million, nine hundred eighty-five thousand, six hundred fifty-one".