1245144 has 32 divisors (see below), whose sum is σ = 3222000. Its totient is φ = 400512.

The previous prime is 1245137. The next prime is 1245149. The reversal of 1245144 is 4415421.

It is a happy number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1245144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199 + ... + 1590.

2^1245144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611000).

1245144 is an abundant number, since it is smaller than the sum of its proper divisors (1976856).

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

1245144 is a wasteful number, since it uses less digits than its factorization.

1245144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827 (or 1823 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 1245144 is about 1115.8602062983. The cubic root of 1245144 is about 107.5820610126.

The spelling of 1245144 in words is "one million, two hundred forty-five thousand, one hundred forty-four".