1220860 has 12 divisors (see below), whose sum is σ = 2563848. Its totient is φ = 488336.

The previous prime is 1220839. The next prime is 1220893. The reversal of 1220860 is 680221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30502 + ... + 30541.

It is an arithmetic number, because the mean of its divisors is an integer number (213654).

2^1220860 is an apocalyptic number.

1220860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220860 is an abundant number, since it is smaller than the sum of its proper divisors (1342988).

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

1220860 is a wasteful number, since it uses less digits than its factorization.

1220860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61052 (or 61050 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1220860 is about 1104.9253368441. The cubic root of 1220860 is about 106.8780746468.

It can be divided in two parts, 1220 and 860, that added together give a triangular number (2080 = T₆₄).

The spelling of 1220860 in words is "one million, two hundred twenty thousand, eight hundred sixty".