3400021 has 4 divisors (see below), whose sum is σ = 3547872. Its totient is φ = 3252172.

The previous prime is 3399997. The next prime is 3400043. The reversal of 3400021 is 1200043.

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: 1200043 = 13 ⋅92311.

It is a cyclic number.

It is not a de Polignac number, because 3400021 - 2⁹ = 3399509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3399980 and 3400007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3400091) 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, 73891 + ... + 73936.

It is an arithmetic number, because the mean of its divisors is an integer number (886968).

Almost surely, 2^3400021 is an apocalyptic number.

It is an amenable number.

3400021 is a deficient number, since it is larger than the sum of its proper divisors (147851).

3400021 is a wasteful number, since it uses less digits than its factorization.

3400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147850.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 3400021 is about 1843.9145858743. The cubic root of 3400021 is about 150.3697692040.

Adding to 3400021 its reverse (1200043), we get a palindrome (4600064).

The spelling of 3400021 in words is "three million, four hundred thousand, twenty-one".