3905429 has 4 divisors (see below), whose sum is σ = 4260480. Its totient is φ = 3550380.

The previous prime is 3905417. The next prime is 3905441. The reversal of 3905429 is 9245093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3905417) and next prime (3905441).

It is a cyclic number.

It is not a de Polignac number, because 3905429 - 2⁴ = 3905413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3905395 and 3905404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177509 + ... + 177530.

It is an arithmetic number, because the mean of its divisors is an integer number (1065120).

Almost surely, 2^3905429 is an apocalyptic number.

It is an amenable number.

3905429 is a deficient number, since it is larger than the sum of its proper divisors (355051).

3905429 is a wasteful number, since it uses less digits than its factorization.

3905429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355050.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 3905429 is about 1976.2158282941. The cubic root of 3905429 is about 157.4790969152.

It can be divided in two parts, 3905 and 429, that added together give a palindrome (4334).

The spelling of 3905429 in words is "three million, nine hundred five thousand, four hundred twenty-nine".