1370220 has 48 divisors (see below), whose sum is σ = 3937248. Its totient is φ = 355840.

The previous prime is 1370219. The next prime is 1370227. The reversal of 1370220 is 220731.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1370220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1370227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2182 + ... + 2738.

It is an arithmetic number, because the mean of its divisors is an integer number (82026).

2^1370220 is an apocalyptic number.

1370220 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 1370220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968624).

1370220 is an abundant number, since it is smaller than the sum of its proper divisors (2567028).

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

1370220 is a wasteful number, since it uses less digits than its factorization.

1370220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610 (or 608 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 1370220 is about 1170.5639666417. The cubic root of 1370220 is about 111.0699988640.

Adding to 1370220 its reverse (220731), we get a palindrome (1590951).

The spelling of 1370220 in words is "one million, three hundred seventy thousand, two hundred twenty".