402154441 has 4 divisors (see below), whose sum is σ = 433089412. Its totient is φ = 371219472.

The previous prime is 402154439. The next prime is 402154451. The reversal of 402154441 is 144451204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 164378041 + 237776400 = 12821^2 + 15420^2 .

It is not a de Polignac number, because 402154441 - 2¹ = 402154439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402154451) 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, 15467466 + ... + 15467491.

It is an arithmetic number, because the mean of its divisors is an integer number (108272353).

Almost surely, 2^402154441 is an apocalyptic number.

It is an amenable number.

402154441 is a deficient number, since it is larger than the sum of its proper divisors (30934971).

402154441 is a wasteful number, since it uses less digits than its factorization.

402154441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934970.

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

The square root of 402154441 is about 20053.7886944088. The cubic root of 402154441 is about 738.1267699131.

The spelling of 402154441 in words is "four hundred two million, one hundred fifty-four thousand, four hundred forty-one".