400601 has 2 divisors, whose sum is σ = 400602.
Its totient is φ = 400600.
The previous prime is 400597. The next prime is 400607. The reversal of 400601 is 106004.
Adding to 400601 its reverse (106004), we get a palindrome (506605).
It can be divided in two parts, 400 and 601, that added together give a palindrome (1001).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 274576 + 126025 = 524^2 + 355^2
It is a cyclic number.
It is not a de Polignac number, because 400601 - 22 = 400597 is a prime.
It is a super-2 number, since 2×4006012 = 320962322402, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (400607) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200300 + 200301.
It is an arithmetic number, because the mean of its divisors is an integer number (200301).
2400601 is an apocalyptic number.
It is an amenable number.
400601 is a deficient number, since it is larger than the sum of its proper divisors (1).
400601 is an equidigital number, since it uses as much as digits as its factorization.
400601 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 24, while the sum is 11.
The square root of 400601 is about 632.9304859145.
The cubic root of 400601 is about 73.7175132221.
The spelling of 400601 in words is "four hundred thousand, six hundred one".