1294697649 has 12 divisors (see below), whose sum is σ = 2008102704. Its totient is φ = 739827144.

The previous prime is 1294697647. The next prime is 1294697653. The reversal of 1294697649 is 9467964921.

It is not a de Polignac number, because 1294697649 - 2¹ = 1294697647 is a prime.

It is a super-2 number, since 2×1294697649² = 3352484004652254402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1294697641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4403587 + ... + 4403880.

It is an arithmetic number, because the mean of its divisors is an integer number (167341892).

Almost surely, 2^1294697649 is an apocalyptic number.

It is an amenable number.

1294697649 is a deficient number, since it is larger than the sum of its proper divisors (713405055).

1294697649 is an equidigital number, since it uses as much as digits as its factorization.

1294697649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8807484 (or 8807477 counting only the distinct ones).

The product of its digits is 5878656, while the sum is 57.

The square root of 1294697649 is about 35981.9072451698. The cubic root of 1294697649 is about 1089.9070282344.

The spelling of 1294697649 in words is "one billion, two hundred ninety-four million, six hundred ninety-seven thousand, six hundred forty-nine".