400287541 has 4 divisors (see below), whose sum is σ = 401179500. Its totient is φ = 399395584.

The previous prime is 400287533. The next prime is 400287599. The reversal of 400287541 is 145782004.

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 139594225 + 260693316 = 11815^2 + 16146^2 .

It is a cyclic number.

It is not a de Polignac number, because 400287541 - 2³ = 400287533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400287241) 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, 445306 + ... + 446203.

It is an arithmetic number, because the mean of its divisors is an integer number (100294875).

Almost surely, 2^400287541 is an apocalyptic number.

It is an amenable number.

400287541 is a deficient number, since it is larger than the sum of its proper divisors (891959).

400287541 is an equidigital number, since it uses as much as digits as its factorization.

400287541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891958.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 400287541 is about 20007.1872335918. The cubic root of 400287541 is about 736.9828091236.

The spelling of 400287541 in words is "four hundred million, two hundred eighty-seven thousand, five hundred forty-one".