1209528 has 48 divisors (see below), whose sum is σ = 3327480. Its totient is φ = 396864.

The previous prime is 1209517. The next prime is 1209539. The reversal of 1209528 is 8259021.

It is an interprime number because it is at equal distance from previous prime (1209517) and next prime (1209539).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7626 + ... + 7782.

2^1209528 is an apocalyptic number.

1209528 is a gapful number since it is divisible by the number (18) 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 1209528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1663740).

1209528 is an abundant number, since it is smaller than the sum of its proper divisors (2117952).

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

1209528 is a wasteful number, since it uses less digits than its factorization.

1209528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1209528 is about 1099.7854336188. The cubic root of 1209528 is about 106.5463661100.

The spelling of 1209528 in words is "one million, two hundred nine thousand, five hundred twenty-eight".