1297530 has 48 divisors (see below), whose sum is σ = 3636360. Its totient is φ = 319104.

The previous prime is 1297523. The next prime is 1297537. The reversal of 1297530 is 357921.

1297530 is a `hidden beast` number, since 129 + 7 + 530 = 666.

It is an interprime number because it is at equal distance from previous prime (1297523) and next prime (1297537).

It can be written as a sum of positive squares in 4 ways, for example, as 393129 + 904401 = 627^2 + 951^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1297494 and 1297503.

It is not an unprimeable number, because it can be changed into a prime (1297537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 616 + ... + 1724.

2^1297530 is an apocalyptic number.

1297530 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 1297530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818180).

1297530 is an abundant number, since it is smaller than the sum of its proper divisors (2338830).

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

1297530 is a wasteful number, since it uses less digits than its factorization.

1297530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 1297530 is about 1139.0917434518. The cubic root of 1297530 is about 109.0701229336.

The spelling of 1297530 in words is "one million, two hundred ninety-seven thousand, five hundred thirty".