3400945 has 4 divisors (see below), whose sum is σ = 4081140. Its totient is φ = 2720752.

The previous prime is 3400931. The next prime is 3400949. The reversal of 3400945 is 5490043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5490043 = 13 ⋅422311.

It can be written as a sum of positive squares in 2 ways, for example, as 1418481 + 1982464 = 1191^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 3400945 - 2²¹ = 1303793 is a prime.

3400945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3400949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340090 + ... + 340099.

It is an arithmetic number, because the mean of its divisors is an integer number (1020285).

Almost surely, 2^3400945 is an apocalyptic number.

It is an amenable number.

3400945 is a deficient number, since it is larger than the sum of its proper divisors (680195).

3400945 is an equidigital number, since it uses as much as digits as its factorization.

3400945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680194.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 3400945 is about 1844.1651227588. The cubic root of 3400945 is about 150.3833896182.

Adding to 3400945 its reverse (5490043), we get a palindrome (8890988).

The spelling of 3400945 in words is "three million, four hundred thousand, nine hundred forty-five".