1240231 has 2 divisors, whose sum is σ = 1240232. Its totient is φ = 1240230.

The previous prime is 1240219. The next prime is 1240241. The reversal of 1240231 is 1320421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1320421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1240231 - 2⁵ = 1240199 is a prime.

It is a super-2 number, since 2×1240231² = 3076345866722, which contains 22 as substring.

It is a Chen prime.

1240231 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620115 + 620116.

It is an arithmetic number, because the mean of its divisors is an integer number (620116).

2^1240231 is an apocalyptic number.

1240231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240231 is an equidigital number, since it uses as much as digits as its factorization.

1240231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1240231 is about 1113.6565897978. The cubic root of 1240231 is about 107.4403779713.

Adding to 1240231 its reverse (1320421), we get a palindrome (2560652).

The spelling of 1240231 in words is "one million, two hundred forty thousand, two hundred thirty-one".