1260447887 has 4 divisors (see below), whose sum is σ = 1268795376. Its totient is φ = 1252100400.

The previous prime is 1260447869. The next prime is 1260447889. The reversal of 1260447887 is 7887440621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1260447887 - 2¹⁴ = 1260431503 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 (1260447889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4173518 + ... + 4173819.

It is an arithmetic number, because the mean of its divisors is an integer number (317198844).

Almost surely, 2^1260447887 is an apocalyptic number.

1260447887 is a deficient number, since it is larger than the sum of its proper divisors (8347489).

1260447887 is an equidigital number, since it uses as much as digits as its factorization.

1260447887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8347488.

The product of its (nonzero) digits is 602112, while the sum is 47.

The square root of 1260447887 is about 35502.7870314430. The cubic root of 1260447887 is about 1080.2102605601.

The spelling of 1260447887 in words is "one billion, two hundred sixty million, four hundred forty-seven thousand, eight hundred eighty-seven".