1047420 has 108 divisors (see below), whose sum is σ = 3623256. Its totient is φ = 242880.

The previous prime is 1047419. The next prime is 1047467. The reversal of 1047420 is 247401.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1047393 and 1047402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45529 + ... + 45551.

2^1047420 is an apocalyptic number.

1047420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1047420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811628).

1047420 is an abundant number, since it is smaller than the sum of its proper divisors (2575836).

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

1047420 is a wasteful number, since it uses less digits than its factorization.

1047420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1047420 is about 1023.4353912192. The cubic root of 1047420 is about 101.5563197028.

The spelling of 1047420 in words is "one million, forty-seven thousand, four hundred twenty".