1253220 has 24 divisors (see below), whose sum is σ = 3509184. Its totient is φ = 334176.

The previous prime is 1253171. The next prime is 1253249. The reversal of 1253220 is 223521.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1253220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10384 + ... + 10503.

It is an arithmetic number, because the mean of its divisors is an integer number (146216).

2^1253220 is an apocalyptic number.

1253220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1253220 is an abundant number, since it is smaller than the sum of its proper divisors (2255964).

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

1253220 is a wasteful number, since it uses less digits than its factorization.

1253220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20899 (or 20897 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1253220 is about 1119.4730903421. The cubic root of 1253220 is about 107.8141522536.

Adding to 1253220 its reverse (223521), we get a palindrome (1476741).

The spelling of 1253220 in words is "one million, two hundred fifty-three thousand, two hundred twenty".