1294064681 has 16 divisors (see below), whose sum is σ = 1609125504. Its totient is φ = 1013313024.

The previous prime is 1294064627. The next prime is 1294064689. The reversal of 1294064681 is 1864604921.

It is a cyclic number.

It is not a de Polignac number, because 1294064681 - 2²⁶ = 1226955817 is a prime.

It is a super-2 number, since 2×1294064681² = 3349206797223263522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1294064689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64475 + ... + 82128.

It is an arithmetic number, because the mean of its divisors is an integer number (100570344).

Almost surely, 2^1294064681 is an apocalyptic number.

It is an amenable number.

1294064681 is a deficient number, since it is larger than the sum of its proper divisors (315060823).

1294064681 is a wasteful number, since it uses less digits than its factorization.

1294064681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146720.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1294064681 is about 35973.1105271702. The cubic root of 1294064681 is about 1089.7293834826.

The spelling of 1294064681 in words is "one billion, two hundred ninety-four million, sixty-four thousand, six hundred eighty-one".