406139401 has 8 divisors (see below), whose sum is σ = 443902464. Its totient is φ = 369917760.

The previous prime is 406139389. The next prime is 406139411. The reversal of 406139401 is 104931604.

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 406139401 - 2¹⁷ = 406008329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406139401.

It is not an unprimeable number, because it can be changed into a prime (406139411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384805 + ... + 385858.

It is an arithmetic number, because the mean of its divisors is an integer number (55487808).

Almost surely, 2^406139401 is an apocalyptic number.

It is an amenable number.

406139401 is a deficient number, since it is larger than the sum of its proper divisors (37763063).

406139401 is a wasteful number, since it uses less digits than its factorization.

406139401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770711.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 406139401 is about 20152.9005604652. The cubic root of 406139401 is about 740.5568009294.

The spelling of 406139401 in words is "four hundred six million, one hundred thirty-nine thousand, four hundred one".