400161241 has 4 divisors (see below), whose sum is σ = 401908900. Its totient is φ = 398413584.

The previous prime is 400161239. The next prime is 400161247. The reversal of 400161241 is 142161004.

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 372335616 + 27825625 = 19296^2 + 5275^2 .

It is a cyclic number.

It is not a de Polignac number, because 400161241 - 2¹ = 400161239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400161247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873486 + ... + 873943.

It is an arithmetic number, because the mean of its divisors is an integer number (100477225).

Almost surely, 2^400161241 is an apocalyptic number.

It is an amenable number.

400161241 is a deficient number, since it is larger than the sum of its proper divisors (1747659).

400161241 is a wasteful number, since it uses less digits than its factorization.

400161241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747658.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 400161241 is about 20004.0306188528. The cubic root of 400161241 is about 736.9052892488.

The spelling of 400161241 in words is "four hundred million, one hundred sixty-one thousand, two hundred forty-one".