1287906241 has 8 divisors (see below), whose sum is σ = 1357106400. Its totient is φ = 1218847680.

The previous prime is 1287906209. The next prime is 1287906259. The reversal of 1287906241 is 1426097821.

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 1287906241 - 2⁵ = 1287906209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287906194 and 1287906203.

It is not an unprimeable number, because it can be changed into a prime (1287906041) 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, 16456 + ... + 53353.

It is an arithmetic number, because the mean of its divisors is an integer number (169638300).

Almost surely, 2^1287906241 is an apocalyptic number.

It is an amenable number.

1287906241 is a deficient number, since it is larger than the sum of its proper divisors (69200159).

1287906241 is an equidigital number, since it uses as much as digits as its factorization.

1287906241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70799.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1287906241 is about 35887.4106198817. The cubic root of 1287906241 is about 1087.9979638014.

The spelling of 1287906241 in words is "one billion, two hundred eighty-seven million, nine hundred six thousand, two hundred forty-one".