3821429 has 4 divisors (see below), whose sum is σ = 3902784. Its totient is φ = 3740076.

The previous prime is 3821423. The next prime is 3821437. The reversal of 3821429 is 9241283.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9241283 = 701 ⋅13183.

It is a cyclic number.

It is not a de Polignac number, because 3821429 - 2⁸ = 3821173 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 (3821423) 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, 40607 + ... + 40700.

It is an arithmetic number, because the mean of its divisors is an integer number (975696).

Almost surely, 2^3821429 is an apocalyptic number.

It is an amenable number.

3821429 is a deficient number, since it is larger than the sum of its proper divisors (81355).

3821429 is an equidigital number, since it uses as much as digits as its factorization.

3821429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81354.

The product of its digits is 3456, while the sum is 29.

The square root of 3821429 is about 1954.8475643896. The cubic root of 3821429 is about 156.3418566019.

The spelling of 3821429 in words is "three million, eight hundred twenty-one thousand, four hundred twenty-nine".