1297140 has 48 divisors (see below), whose sum is σ = 3913728. Its totient is φ = 319104.

The previous prime is 1297139. The next prime is 1297147. The reversal of 1297140 is 417921.

It is a self number, because there is not a number n which added to its sum of digits gives 1297140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297147) 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, 52 + ... + 1611.

It is an arithmetic number, because the mean of its divisors is an integer number (81536).

2^1297140 is an apocalyptic number.

1297140 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 1297140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1956864).

1297140 is an abundant number, since it is smaller than the sum of its proper divisors (2616588).

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

1297140 is a wasteful number, since it uses less digits than its factorization.

1297140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1297140 is about 1138.9205415656. The cubic root of 1297140 is about 109.0591940635.

The spelling of 1297140 in words is "one million, two hundred ninety-seven thousand, one hundred forty".