1942391 has 8 divisors (see below), whose sum is σ = 2192400. Its totient is φ = 1704640.

The previous prime is 1942387. The next prime is 1942399. The reversal of 1942391 is 1932491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1942391 - 2² = 1942387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1942399) 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, 2726 + ... + 3363.

It is an arithmetic number, because the mean of its divisors is an integer number (274050).

2^1942391 is an apocalyptic number.

1942391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1942391 is a deficient number, since it is larger than the sum of its proper divisors (250009).

1942391 is a wasteful number, since it uses less digits than its factorization.

1942391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6129.

The product of its digits is 1944, while the sum is 29.

The square root of 1942391 is about 1393.6968823959. The cubic root of 1942391 is about 124.7705872158.

The spelling of 1942391 in words is "one million, nine hundred forty-two thousand, three hundred ninety-one".