1225142 has 8 divisors (see below), whose sum is σ = 1843536. Its totient is φ = 610632.

The previous prime is 1225129. The next prime is 1225153. The reversal of 1225142 is 2415221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1225142.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (230442).

2^1225142 is an apocalyptic number.

1225142 is a deficient number, since it is larger than the sum of its proper divisors (618394).

1225142 is a wasteful number, since it uses less digits than its factorization.

1225142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942.

The product of its digits is 160, while the sum is 17.

The square root of 1225142 is about 1106.8613282611. The cubic root of 1225142 is about 107.0028822702.

The spelling of 1225142 in words is "one million, two hundred twenty-five thousand, one hundred forty-two".