1217240 has 16 divisors (see below), whose sum is σ = 2738880. Its totient is φ = 486880.

The previous prime is 1217233. The next prime is 1217261. The reversal of 1217240 is 427121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15176 + ... + 15255.

It is an arithmetic number, because the mean of its divisors is an integer number (171180).

2^1217240 is an apocalyptic number.

1217240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217240 is an abundant number, since it is smaller than the sum of its proper divisors (1521640).

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

1217240 is a wasteful number, since it uses less digits than its factorization.

1217240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30442 (or 30438 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1217240 is about 1103.2860009988. The cubic root of 1217240 is about 106.7723345231.

The spelling of 1217240 in words is "one million, two hundred seventeen thousand, two hundred forty".