1229745 has 32 divisors (see below), whose sum is σ = 2229120. Its totient is φ = 573440.

The previous prime is 1229743. The next prime is 1229773. The reversal of 1229745 is 5479221.

It is not a de Polignac number, because 1229745 - 2¹ = 1229743 is a prime.

It is a Curzon number.

1229745 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1229743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4657 + ... + 4913.

It is an arithmetic number, because the mean of its divisors is an integer number (69660).

2^1229745 is an apocalyptic number.

1229745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1229745 is a deficient number, since it is larger than the sum of its proper divisors (999375).

1229745 is a wasteful number, since it uses less digits than its factorization.

1229745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 5040, while the sum is 30.

The square root of 1229745 is about 1108.9386818035. The cubic root of 1229745 is about 107.1367221884.

The spelling of 1229745 in words is "one million, two hundred twenty-nine thousand, seven hundred forty-five".