1225380 has 48 divisors (see below), whose sum is σ = 3697344. Its totient is φ = 301440.

The previous prime is 1225373. The next prime is 1225381. The reversal of 1225380 is 835221.

It is a super-2 number, since 2×1225380² = 3003112288800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225381) 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, 6 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (77028).

2^1225380 is an apocalyptic number.

1225380 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 1225380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1848672).

1225380 is an abundant number, since it is smaller than the sum of its proper divisors (2471964).

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

1225380 is a wasteful number, since it uses less digits than its factorization.

1225380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1225380 is about 1106.9688342496. The cubic root of 1225380 is about 107.0098107288.

The spelling of 1225380 in words is "one million, two hundred twenty-five thousand, three hundred eighty".