1244145 has 48 divisors (see below), whose sum is σ = 2475648. Its totient is φ = 522240.

The previous prime is 1244143. The next prime is 1244149. The reversal of 1244145 is 5414421.

It is a happy number.

It is not a de Polignac number, because 1244145 - 2¹ = 1244143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30325 + ... + 30365.

It is an arithmetic number, because the mean of its divisors is an integer number (51576).

2^1244145 is an apocalyptic number.

1244145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1244145 is a deficient number, since it is larger than the sum of its proper divisors (1231503).

1244145 is a wasteful number, since it uses less digits than its factorization.

1244145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 73 counting only the distinct ones).

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

The square root of 1244145 is about 1115.4124797580. The cubic root of 1244145 is about 107.5532816814.

Adding to 1244145 its reverse (5414421), we get a palindrome (6658566).

The spelling of 1244145 in words is "one million, two hundred forty-four thousand, one hundred forty-five".