1445400 has 144 divisors (see below), whose sum is σ = 5367960. Its totient is φ = 345600.

The previous prime is 1445371. The next prime is 1445401. The reversal of 1445400 is 45441.

Added to its reverse (45441) it gives a square (1490841 = 1221²).

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19764 + ... + 19836.

2^1445400 is an apocalyptic number.

1445400 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 1445400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2683980).

1445400 is an abundant number, since it is smaller than the sum of its proper divisors (3922560).

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

1445400 is a wasteful number, since it uses less digits than its factorization.

1445400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 1445400 is about 1202.2478945708. The cubic root of 1445400 is about 113.0653027925.

Adding to 1445400 its reverse (45441), we get a square (1490841 = 1221²).

The spelling of 1445400 in words is "one million, four hundred forty-five thousand, four hundred".