402124243 has 2 divisors, whose sum is σ = 402124244. Its totient is φ = 402124242.

The previous prime is 402124241. The next prime is 402124259. The reversal of 402124243 is 342421204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402124243 - 2¹ = 402124241 is a prime.

Together with 402124241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402124241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201062121 + 201062122.

It is an arithmetic number, because the mean of its divisors is an integer number (201062122).

Almost surely, 2^402124243 is an apocalyptic number.

402124243 is a deficient number, since it is larger than the sum of its proper divisors (1).

402124243 is an equidigital number, since it uses as much as digits as its factorization.

402124243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 402124243 is about 20053.0357552167. The cubic root of 402124243 is about 738.1082940011.

Adding to 402124243 its reverse (342421204), we get a palindrome (744545447).

The spelling of 402124243 in words is "four hundred two million, one hundred twenty-four thousand, two hundred forty-three".