1260643247 has 8 divisors (see below), whose sum is σ = 1264856544. Its totient is φ = 1256437728.

The previous prime is 1260643231. The next prime is 1260643283. The reversal of 1260643247 is 7423460621.

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 1260643247 - 2⁴ = 1260643231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1260643297) 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, 548633 + ... + 550925.

It is an arithmetic number, because the mean of its divisors is an integer number (158107068).

Almost surely, 2^1260643247 is an apocalyptic number.

1260643247 is a deficient number, since it is larger than the sum of its proper divisors (4213297).

1260643247 is a wasteful number, since it uses less digits than its factorization.

1260643247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3889.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 1260643247 is about 35505.5382581366. The cubic root of 1260643247 is about 1080.2660658488.

The spelling of 1260643247 in words is "one billion, two hundred sixty million, six hundred forty-three thousand, two hundred forty-seven".