1252240 has 40 divisors (see below), whose sum is σ = 3178368. Its totient is φ = 455040.

The previous prime is 1252219. The next prime is 1252247. The reversal of 1252240 is 422521.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (1252247) 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, 169 + ... + 1591.

2^1252240 is an apocalyptic number.

1252240 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 1252240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1589184).

1252240 is an abundant number, since it is smaller than the sum of its proper divisors (1926128).

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

1252240 is a wasteful number, since it uses less digits than its factorization.

1252240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447 (or 1441 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1252240 is about 1119.0352988177. The cubic root of 1252240 is about 107.7860418867.

Adding to 1252240 its reverse (422521), we get a palindrome (1674761).

The spelling of 1252240 in words is "one million, two hundred fifty-two thousand, two hundred forty".