1296740905 has 8 divisors (see below), whose sum is σ = 1562945472. Its totient is φ = 1032821808.

The previous prime is 1296740903. The next prime is 1296740917. The reversal of 1296740905 is 5090476921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1296740905 - 2¹ = 1296740903 is a prime.

It is a super-3 number, since 3×1296740905³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1296740903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570117 + ... + 572386.

It is an arithmetic number, because the mean of its divisors is an integer number (195368184).

Almost surely, 2^1296740905 is an apocalyptic number.

It is an amenable number.

1296740905 is a deficient number, since it is larger than the sum of its proper divisors (266204567).

1296740905 is a wasteful number, since it uses less digits than its factorization.

1296740905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142735.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 1296740905 is about 36010.2888769307. The cubic root of 1296740905 is about 1090.4800805848.

The spelling of 1296740905 in words is "one billion, two hundred ninety-six million, seven hundred forty thousand, nine hundred five".