1258240 has 36 divisors (see below), whose sum is σ = 3016944. Its totient is φ = 502784.

The previous prime is 1258219. The next prime is 1258241. The reversal of 1258240 is 428521.

It is not an unprimeable number, because it can be changed into a prime (1258241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789 + ... + 1771.

It is an arithmetic number, because the mean of its divisors is an integer number (83804).

2^1258240 is an apocalyptic number.

1258240 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 1258240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1508472).

1258240 is an abundant number, since it is smaller than the sum of its proper divisors (1758704).

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

1258240 is an frugal number, since it uses more digits than its factorization.

1258240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004 (or 990 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1258240 is about 1121.7129757652. The cubic root of 1258240 is about 107.9579168459.

The spelling of 1258240 in words is "one million, two hundred fifty-eight thousand, two hundred forty".