1242380 has 12 divisors (see below), whose sum is σ = 2609040. Its totient is φ = 496944.

The previous prime is 1242379. The next prime is 1242403. The reversal of 1242380 is 832421.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 62119 = 1242380 / (1 + 2 + 4 + 2 + 3 + 8 + 0).

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, 31040 + ... + 31079.

It is an arithmetic number, because the mean of its divisors is an integer number (217420).

2^1242380 is an apocalyptic number.

1242380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242380 is an abundant number, since it is smaller than the sum of its proper divisors (1366660).

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

1242380 is a wasteful number, since it uses less digits than its factorization.

1242380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62128 (or 62126 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1242380 is about 1114.6210118242. The cubic root of 1242380 is about 107.5023976390.

The spelling of 1242380 in words is "one million, two hundred forty-two thousand, three hundred eighty".