1253420 has 36 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 429408.

The previous prime is 1253401. The next prime is 1253437. The reversal of 1253420 is 243521.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 341 + ... + 1619.

It is an arithmetic number, because the mean of its divisors is an integer number (85120).

2^1253420 is an apocalyptic number.

1253420 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 1253420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532160).

1253420 is an abundant number, since it is smaller than the sum of its proper divisors (1810900).

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

1253420 is a wasteful number, since it uses less digits than its factorization.

1253420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 1253420 is about 1119.5624145174. The cubic root of 1253420 is about 107.8198872625.

Adding to 1253420 its reverse (243521), we get a palindrome (1496941).

The spelling of 1253420 in words is "one million, two hundred fifty-three thousand, four hundred twenty".