1245090 has 96 divisors (see below), whose sum is σ = 3830400. Its totient is φ = 258720.

The previous prime is 1245067. The next prime is 1245091. The reversal of 1245090 is 905421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113185 + ... + 113195.

It is an arithmetic number, because the mean of its divisors is an integer number (39900).

2^1245090 is an apocalyptic number.

1245090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1915200).

1245090 is an abundant number, since it is smaller than the sum of its proper divisors (2585310).

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

1245090 is a wasteful number, since it uses less digits than its factorization.

1245090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1245090 is about 1115.8360094566. The cubic root of 1245090 is about 107.5805057667.

The spelling of 1245090 in words is "one million, two hundred forty-five thousand, ninety".