400143041 has 2 divisors, whose sum is σ = 400143042. Its totient is φ = 400143040.

The previous prime is 400143019. The next prime is 400143043. The reversal of 400143041 is 140341004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253733041 + 146410000 = 15929^2 + 12100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400143041 is a prime.

It is a super-2 number, since 2×400143041² = 320228906521455362, which contains 22 as substring.

Together with 400143043, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (400143043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200071520 + 200071521.

It is an arithmetic number, because the mean of its divisors is an integer number (200071521).

Almost surely, 2^400143041 is an apocalyptic number.

It is an amenable number.

400143041 is a deficient number, since it is larger than the sum of its proper divisors (1).

400143041 is an equidigital number, since it uses as much as digits as its factorization.

400143041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400143041 is about 20003.5757053583. The cubic root of 400143041 is about 736.8941171859.

Adding to 400143041 its reverse (140341004), we get a palindrome (540484045).

The spelling of 400143041 in words is "four hundred million, one hundred forty-three thousand, forty-one".