1220370 has 32 divisors (see below), whose sum is σ = 3084480. Its totient is φ = 308160.

The previous prime is 1220369. The next prime is 1220393. The reversal of 1220370 is 730221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 501 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (96390).

2^1220370 is an apocalyptic number.

1220370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220370 is an abundant number, since it is smaller than the sum of its proper divisors (1864110).

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

1220370 is a wasteful number, since it uses less digits than its factorization.

1220370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170.

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

The square root of 1220370 is about 1104.7035801517. The cubic root of 1220370 is about 106.8637739996.

Adding to 1220370 its reverse (730221), we get a palindrome (1950591).

The spelling of 1220370 in words is "one million, two hundred twenty thousand, three hundred seventy".