402134251 has 2 divisors, whose sum is σ = 402134252. Its totient is φ = 402134250.

The previous prime is 402134219. The next prime is 402134279. The reversal of 402134251 is 152431204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402134251 - 2⁵ = 402134219 is a prime.

It is not a weakly prime, because it can be changed into another prime (402134951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201067125 + 201067126.

It is an arithmetic number, because the mean of its divisors is an integer number (201067126).

Almost surely, 2^402134251 is an apocalyptic number.

402134251 is a deficient number, since it is larger than the sum of its proper divisors (1).

402134251 is an equidigital number, since it uses as much as digits as its factorization.

402134251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 402134251 is about 20053.2852919416. The cubic root of 402134251 is about 738.1144172550.

Adding to 402134251 its reverse (152431204), we get a palindrome (554565455).

The spelling of 402134251 in words is "four hundred two million, one hundred thirty-four thousand, two hundred fifty-one".