1240464 has 40 divisors (see below), whose sum is σ = 3284512. Its totient is φ = 403200.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240464 is 4640421.

It is a self number, because there is not a number n which added to its sum of digits gives 1240464.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1764 + ... + 2364.

2^1240464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1642256).

1240464 is an abundant number, since it is smaller than the sum of its proper divisors (2044048).

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

1240464 is a wasteful number, since it uses less digits than its factorization.

1240464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1240464 is about 1113.7611952299. The cubic root of 1240464 is about 107.4471057612.

Adding to 1240464 its reverse (4640421), we get a palindrome (5880885).

The spelling of 1240464 in words is "one million, two hundred forty thousand, four hundred sixty-four".