400187041 has 4 divisors (see below), whose sum is σ = 400430212. Its totient is φ = 399943872.

The previous prime is 400187009. The next prime is 400187071. The reversal of 400187041 is 140781004.

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 35224225 + 364962816 = 5935^2 + 19104^2 .

It is a cyclic number.

It is not a de Polignac number, because 400187041 - 2⁵ = 400187009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400186997 and 400187015.

It is not an unprimeable number, because it can be changed into a prime (400187071) 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, 119100 + ... + 122413.

It is an arithmetic number, because the mean of its divisors is an integer number (100107553).

Almost surely, 2^400187041 is an apocalyptic number.

It is an amenable number.

400187041 is a deficient number, since it is larger than the sum of its proper divisors (243171).

400187041 is a wasteful number, since it uses less digits than its factorization.

400187041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243170.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 400187041 is about 20004.6754784975. The cubic root of 400187041 is about 736.9211259882.

The spelling of 400187041 in words is "four hundred million, one hundred eighty-seven thousand, forty-one".