401791154 has 4 divisors (see below), whose sum is σ = 602686734. Its totient is φ = 200895576.

The previous prime is 401791139. The next prime is 401791171. The reversal of 401791154 is 451197104.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 358534225 + 43256929 = 18935^2 + 6577^2 .

It is a super-2 number, since 2×401791154² = 322872262865303432, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 401791154.

It is an unprimeable number.

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, 100447787 + ... + 100447790.

Almost surely, 2^401791154 is an apocalyptic number.

401791154 is a deficient number, since it is larger than the sum of its proper divisors (200895580).

401791154 is a wasteful number, since it uses less digits than its factorization.

401791154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200895579.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 401791154 is about 20044.7288332868. The cubic root of 401791154 is about 737.9044401991.

The spelling of 401791154 in words is "four hundred one million, seven hundred ninety-one thousand, one hundred fifty-four".