1245400 has 48 divisors (see below), whose sum is σ = 3124800. Its totient is φ = 458880.

The previous prime is 1245397. The next prime is 1245401. The reversal of 1245400 is 45421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245401) 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 11 ways as a sum of consecutive naturals, for example, 2361 + ... + 2839.

It is an arithmetic number, because the mean of its divisors is an integer number (65100).

2^1245400 is an apocalyptic number.

1245400 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 1245400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562400).

1245400 is an abundant number, since it is smaller than the sum of its proper divisors (1879400).

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

1245400 is a wasteful number, since it uses less digits than its factorization.

1245400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 499 counting only the distinct ones).

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

The square root of 1245400 is about 1115.9749101122. The cubic root of 1245400 is about 107.5894334183.

The spelling of 1245400 in words is "one million, two hundred forty-five thousand, four hundred".