1258220 has 24 divisors (see below), whose sum is σ = 2694384. Its totient is φ = 493376.

The previous prime is 1258219. The next prime is 1258241. The reversal of 1258220 is 228521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1258192 and 1258201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 467 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (112266).

2^1258220 is an apocalyptic number.

1258220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1258220 is an abundant number, since it is smaller than the sum of its proper divisors (1436164).

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

1258220 is a wasteful number, since it uses less digits than its factorization.

1258220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1247 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1258220 is about 1121.7040607932. The cubic root of 1258220 is about 107.9573448380.

The spelling of 1258220 in words is "one million, two hundred fifty-eight thousand, two hundred twenty".