1940231 has 4 divisors (see below), whose sum is σ = 1958472. Its totient is φ = 1921992.

The previous prime is 1940221. The next prime is 1940233. The reversal of 1940231 is 1320491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320491 = 197 ⋅6703.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1940231 is a prime.

It is a super-2 number, since 2×1940231² = 7528992666722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1940233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8960 + ... + 9173.

It is an arithmetic number, because the mean of its divisors is an integer number (489618).

2^1940231 is an apocalyptic number.

1940231 is a deficient number, since it is larger than the sum of its proper divisors (18241).

1940231 is a wasteful number, since it uses less digits than its factorization.

1940231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18240.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1940231 is about 1392.9217494174. The cubic root of 1940231 is about 124.7243204533.

The spelling of 1940231 in words is "one million, nine hundred forty thousand, two hundred thirty-one".