1215340 has 24 divisors (see below), whose sum is σ = 2917152. Its totient is φ = 416640.

The previous prime is 1215329. The next prime is 1215349. The reversal of 1215340 is 435121.

It is not an unprimeable number, because it can be changed into a prime (1215349) 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, 4201 + ... + 4480.

It is an arithmetic number, because the mean of its divisors is an integer number (121548).

2^1215340 is an apocalyptic number.

1215340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1215340 is an abundant number, since it is smaller than the sum of its proper divisors (1701812).

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

1215340 is a wasteful number, since it uses less digits than its factorization.

1215340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8697 (or 8695 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1215340 is about 1102.4246005963. The cubic root of 1215340 is about 106.7167516527.

The spelling of 1215340 in words is "one million, two hundred fifteen thousand, three hundred forty".