1224945 has 24 divisors (see below), whose sum is σ = 2149056. Its totient is φ = 645408.

The previous prime is 1224943. The next prime is 1224953. The reversal of 1224945 is 5494221.

It is not a de Polignac number, because 1224945 - 2¹ = 1224943 is a prime.

1224945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1224943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7252 + ... + 7418.

It is an arithmetic number, because the mean of its divisors is an integer number (89544).

2^1224945 is an apocalyptic number.

1224945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224945 is a deficient number, since it is larger than the sum of its proper divisors (924111).

1224945 is a wasteful number, since it uses less digits than its factorization.

1224945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 338 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 1224945 is about 1106.7723343127. The cubic root of 1224945 is about 106.9971466907.

The spelling of 1224945 in words is "one million, two hundred twenty-four thousand, nine hundred forty-five".