401599 has 6 divisors (see below), whose sum is σ = 441560. Its totient is φ = 364980.

The previous prime is 401593. The next prime is 401627. The reversal of 401599 is 995104.

It is not a de Polignac number, because 401599 - 2⁵ = 401567 is a prime.

It is a super-2 number, since 2×401599² = 322563513602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1539 + ... + 1780.

2⁴⁰¹⁵⁹⁹ is an apocalyptic number.

401599 is a deficient number, since it is larger than the sum of its proper divisors (39961).

401599 is a wasteful number, since it uses less digits than its factorization.

401599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341 (or 3330 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 401599 is about 633.7183917167. The cubic root of 401599 is about 73.7786788779.

Subtracting 401599 from its reverse (995104), we obtain a triangular number (593505 = T₁₀₈₉).

It can be divided in two parts, 4015 and 99, that added together give a palindrome (4114).

The spelling of 401599 in words is "four hundred one thousand, five hundred ninety-nine".