5991405 has 32 divisors (see below), whose sum is σ = 11218944. Its totient is φ = 2673216.

The previous prime is 5991397. The next prime is 5991413. The reversal of 5991405 is 5041995.

It is an interprime number because it is at equal distance from previous prime (5991397) and next prime (5991413).

It is not a de Polignac number, because 5991405 - 2³ = 5991397 is a prime.

It is a Curzon number.

5991405 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3852 + ... + 5178.

It is an arithmetic number, because the mean of its divisors is an integer number (350592).

Almost surely, 2^5991405 is an apocalyptic number.

It is an amenable number.

5991405 is a deficient number, since it is larger than the sum of its proper divisors (5227539).

5991405 is a wasteful number, since it uses less digits than its factorization.

5991405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 5991405 is about 2447.7346669931. The cubic root of 5991405 is about 181.6252503104.

The spelling of 5991405 in words is "five million, nine hundred ninety-one thousand, four hundred five".