1220730 has 32 divisors (see below), whose sum is σ = 3348864. Its totient is φ = 278976.

The previous prime is 1220729. The next prime is 1220743. The reversal of 1220730 is 370221.

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

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, 2697 + ... + 3116.

It is an arithmetic number, because the mean of its divisors is an integer number (104652).

2^1220730 is an apocalyptic number.

1220730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1220730 is an abundant number, since it is smaller than the sum of its proper divisors (2128134).

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

1220730 is a wasteful number, since it uses less digits than its factorization.

1220730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830.

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

The square root of 1220730 is about 1104.8665077737. The cubic root of 1220730 is about 106.8742809705.

Adding to 1220730 its reverse (370221), we get a palindrome (1590951).

The spelling of 1220730 in words is "one million, two hundred twenty thousand, seven hundred thirty".