1213144 has 8 divisors (see below), whose sum is σ = 2274660. Its totient is φ = 606568.

The previous prime is 1213141. The next prime is 1213151. The reversal of 1213144 is 4413121.

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75814 + ... + 75829.

2^1213144 is an apocalyptic number.

It is an amenable number.

1213144 is a deficient number, since it is larger than the sum of its proper divisors (1061516).

1213144 is a wasteful number, since it uses less digits than its factorization.

1213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151649 (or 151645 counting only the distinct ones).

The product of its digits is 96, while the sum is 16.

The square root of 1213144 is about 1101.4281637946. The cubic root of 1213144 is about 106.6524373380.

Adding to 1213144 its reverse (4413121), we get a palindrome (5626265).

The spelling of 1213144 in words is "one million, two hundred thirteen thousand, one hundred forty-four".