401581126 has 4 divisors (see below), whose sum is σ = 602371692. Its totient is φ = 200790562.

The previous prime is 401581111. The next prime is 401581133. The reversal of 401581126 is 621185104.

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

It is a super-2 number, since 2×401581126² = 322534801518855752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401581094 and 401581103.

It is a congruent number.

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, 100395280 + ... + 100395283.

It is an arithmetic number, because the mean of its divisors is an integer number (150592923).

Almost surely, 2^401581126 is an apocalyptic number.

401581126 is a deficient number, since it is larger than the sum of its proper divisors (200790566).

401581126 is a wasteful number, since it uses less digits than its factorization.

401581126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200790565.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 401581126 is about 20039.4891651459. The cubic root of 401581126 is about 737.7758430374.

The spelling of 401581126 in words is "four hundred one million, five hundred eighty-one thousand, one hundred twenty-six".