406165901 has 8 divisors (see below), whose sum is σ = 427788864. Its totient is φ = 384873280.

The previous prime is 406165897. The next prime is 406165919. The reversal of 406165901 is 109561604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406165901 - 2² = 406165897 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 (406165301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80060 + ... + 84981.

It is an arithmetic number, because the mean of its divisors is an integer number (53473608).

Almost surely, 2^406165901 is an apocalyptic number.

It is an amenable number.

406165901 is a deficient number, since it is larger than the sum of its proper divisors (21622963).

406165901 is a wasteful number, since it uses less digits than its factorization.

406165901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165171.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 406165901 is about 20153.5580233367. The cubic root of 406165901 is about 740.5729073273.

The spelling of 406165901 in words is "four hundred six million, one hundred sixty-five thousand, nine hundred one".