1225420 has 24 divisors (see below), whose sum is σ = 2941344. Its totient is φ = 420096.

The previous prime is 1225409. The next prime is 1225459. The reversal of 1225420 is 245221.

1225420 is nontrivially palindromic in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 1225394 and 1225403.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4237 + ... + 4516.

It is an arithmetic number, because the mean of its divisors is an integer number (122556).

2^1225420 is an apocalyptic number.

1225420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225420 is an abundant number, since it is smaller than the sum of its proper divisors (1715924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225420 is a wasteful number, since it uses less digits than its factorization.

1225420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8769 (or 8767 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1225420 is about 1106.9869014582. The cubic root of 1225420 is about 107.0109750876.

The spelling of 1225420 in words is "one million, two hundred twenty-five thousand, four hundred twenty".