1240985 has 8 divisors (see below), whose sum is σ = 1567680. Its totient is φ = 940464.

The previous prime is 1240979. The next prime is 1240991. The reversal of 1240985 is 5890421.

It is an interprime number because it is at equal distance from previous prime (1240979) and next prime (1240991).

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 1240985 - 2¹⁰ = 1239961 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6437 + ... + 6626.

It is an arithmetic number, because the mean of its divisors is an integer number (195960).

2^1240985 is an apocalyptic number.

It is an amenable number.

1240985 is a deficient number, since it is larger than the sum of its proper divisors (326695).

1240985 is a wasteful number, since it uses less digits than its factorization.

1240985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13087.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1240985 is about 1113.9950628257. The cubic root of 1240985 is about 107.4621463983.

The spelling of 1240985 in words is "one million, two hundred forty thousand, nine hundred eighty-five".