3421745 has 4 divisors (see below), whose sum is σ = 4106100. Its totient is φ = 2737392.

The previous prime is 3421711. The next prime is 3421751. The reversal of 3421745 is 5471243.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5471243 = 53 ⋅103231.

It can be written as a sum of positive squares in 2 ways, for example, as 595984 + 2825761 = 772^2 + 1681^2 .

It is a cyclic number.

It is not a de Polignac number, because 3421745 - 2¹² = 3417649 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342170 + ... + 342179.

It is an arithmetic number, because the mean of its divisors is an integer number (1026525).

Almost surely, 2^3421745 is an apocalyptic number.

It is an amenable number.

3421745 is a deficient number, since it is larger than the sum of its proper divisors (684355).

3421745 is an equidigital number, since it uses as much as digits as its factorization.

3421745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684354.

The product of its digits is 3360, while the sum is 26.

The square root of 3421745 is about 1849.7959346912. The cubic root of 3421745 is about 150.6893456824.

Adding to 3421745 its reverse (5471243), we get a palindrome (8892988).

The spelling of 3421745 in words is "three million, four hundred twenty-one thousand, seven hundred forty-five".