1253430 has 48 divisors (see below), whose sum is σ = 3435120. Its totient is φ = 316224.

The previous prime is 1253401. The next prime is 1253437. The reversal of 1253430 is 343521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253437) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1344 + ... + 2076.

It is an arithmetic number, because the mean of its divisors is an integer number (71565).

2^1253430 is an apocalyptic number.

1253430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717560).

1253430 is an abundant number, since it is smaller than the sum of its proper divisors (2181690).

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

1253430 is a wasteful number, since it uses less digits than its factorization.

1253430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 1253430 is about 1119.5668805391. The cubic root of 1253430 is about 107.8201739969.

Adding to 1253430 its reverse (343521), we get a palindrome (1596951).

Subtracting from 1253430 its reverse (343521), we obtain a palindrome (909909).

The spelling of 1253430 in words is "one million, two hundred fifty-three thousand, four hundred thirty".