1240000 has 70 divisors (see below), whose sum is σ = 3173984. Its totient is φ = 480000.

The previous prime is 1239989. The next prime is 1240007. The reversal of 1240000 is 421.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39985 + ... + 40015.

2^1240000 is an apocalyptic number.

1240000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586992).

1240000 is an abundant number, since it is smaller than the sum of its proper divisors (1933984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240000 is an frugal number, since it uses more digits than its factorization.

1240000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 38 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 1240000 is about 1113.5528725660. The cubic root of 1240000 is about 107.4337070989.

Adding to 1240000 its reverse (421), we get a palindrome (1240421).

The spelling of 1240000 in words is "one million, two hundred forty thousand".