402144451 has 4 divisors (see below), whose sum is σ = 402849304. Its totient is φ = 401439600.

The previous prime is 402144433. The next prime is 402144467. The reversal of 402144451 is 154441204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402144451 - 2⁹ = 402143939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402145451) 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 in 3 ways as a sum of consecutive naturals, for example, 351570 + ... + 352711.

It is an arithmetic number, because the mean of its divisors is an integer number (100712326).

Almost surely, 2^402144451 is an apocalyptic number.

402144451 is a deficient number, since it is larger than the sum of its proper divisors (704853).

402144451 is an equidigital number, since it uses as much as digits as its factorization.

402144451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704852.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 402144451 is about 20053.5396127467. The cubic root of 402144451 is about 738.1206578769.

Adding to 402144451 its reverse (154441204), we get a palindrome (556585655).

The spelling of 402144451 in words is "four hundred two million, one hundred forty-four thousand, four hundred fifty-one".