1240987 has 8 divisors (see below), whose sum is σ = 1368432. Its totient is φ = 1116000.

The previous prime is 1240979. The next prime is 1240991. The reversal of 1240987 is 7890421.

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 1240987 - 2³ = 1240979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240957) 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, 553 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (171054).

2^1240987 is an apocalyptic number.

1240987 is a deficient number, since it is larger than the sum of its proper divisors (127445).

1240987 is a wasteful number, since it uses less digits than its factorization.

1240987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1240987 is about 1113.9959604954. The cubic root of 1240987 is about 107.4622041277.

The spelling of 1240987 in words is "one million, two hundred forty thousand, nine hundred eighty-seven".