1296449064 has 40 divisors (see below), whose sum is σ = 3631259610. Its totient is φ = 432149472.

The previous prime is 1296449051. The next prime is 1296449083. The reversal of 1296449064 is 4609446921.

1296449064 is a `hidden beast` number, since 12 + 96 + 4 + 490 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1079122500 + 217326564 = 32850^2 + 14742^2 .

1296449064 is a modest number, since divided by 449064 gives 1296 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 999699 + ... + 1000994.

Almost surely, 2^1296449064 is an apocalyptic number.

It is an amenable number.

1296449064 is an abundant number, since it is smaller than the sum of its proper divisors (2334810546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1296449064 is a wasteful number, since it uses less digits than its factorization.

1296449064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000711 (or 2000698 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1296449064 is about 36006.2364598135. The cubic root of 1296449064 is about 1090.3982676147.

The spelling of 1296449064 in words is "one billion, two hundred ninety-six million, four hundred forty-nine thousand, sixty-four".