1225418 has 8 divisors (see below), whose sum is σ = 1842912. Its totient is φ = 611116.

The previous prime is 1225409. The next prime is 1225459. The reversal of 1225418 is 8145221.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1225393 and 1225402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821 + ... + 1767.

It is an arithmetic number, because the mean of its divisors is an integer number (230364).

2^1225418 is an apocalyptic number.

1225418 is a deficient number, since it is larger than the sum of its proper divisors (617494).

1225418 is an equidigital number, since it uses as much as digits as its factorization.

1225418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596.

The product of its digits is 640, while the sum is 23.

The square root of 1225418 is about 1106.9859981048. The cubic root of 1225418 is about 107.0109168703.

Subtracting from 1225418 its sum of digits (23), we obtain a triangular number (1225395 = T₁₅₆₅).

The spelling of 1225418 in words is "one million, two hundred twenty-five thousand, four hundred eighteen".