404242351 has 2 divisors, whose sum is σ = 404242352. Its totient is φ = 404242350.

The previous prime is 404242313. The next prime is 404242357. The reversal of 404242351 is 153242404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 404242351 - 2²¹ = 402145199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404242357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202121175 + 202121176.

It is an arithmetic number, because the mean of its divisors is an integer number (202121176).

Almost surely, 2^404242351 is an apocalyptic number.

404242351 is a deficient number, since it is larger than the sum of its proper divisors (1).

404242351 is an equidigital number, since it uses as much as digits as its factorization.

404242351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 404242351 is about 20105.7790448418. The cubic root of 404242351 is about 739.4019705715.

Adding to 404242351 its reverse (153242404), we get a palindrome (557484755).

The spelling of 404242351 in words is "four hundred four million, two hundred forty-two thousand, three hundred fifty-one".