401129906 has 4 divisors (see below), whose sum is σ = 601694862. Its totient is φ = 200564952.

The previous prime is 401129893. The next prime is 401129921. The reversal of 401129906 is 609921104.

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., 235776025 + 165353881 = 15355^2 + 12859^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100282475 + ... + 100282478.

Almost surely, 2^401129906 is an apocalyptic number.

401129906 is a deficient number, since it is larger than the sum of its proper divisors (200564956).

401129906 is a wasteful number, since it uses less digits than its factorization.

401129906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200564955.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 401129906 is about 20028.2277298816. The cubic root of 401129906 is about 737.4994157230.

The spelling of 401129906 in words is "four hundred one million, one hundred twenty-nine thousand, nine hundred six".