1245120 has 56 divisors (see below), whose sum is σ = 3956304. Its totient is φ = 331776.

The previous prime is 1245113. The next prime is 1245121. The reversal of 1245120 is 215421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1245120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312 + ... + 1608.

2^1245120 is an apocalyptic number.

1245120 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 1245120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978152).

1245120 is an abundant number, since it is smaller than the sum of its proper divisors (2711184).

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

1245120 is a wasteful number, since it uses less digits than its factorization.

1245120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1245120 is about 1115.8494522112. The cubic root of 1245120 is about 107.5813697977.

The spelling of 1245120 in words is "one million, two hundred forty-five thousand, one hundred twenty".