3450405 has 32 divisors (see below), whose sum is σ = 6683904. Its totient is φ = 1483776.

The previous prime is 3450401. The next prime is 3450407. The reversal of 3450405 is 5040543.

It is a happy number.

It is not a de Polignac number, because 3450405 - 2² = 3450401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3450401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 819 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (208872).

Almost surely, 2^3450405 is an apocalyptic number.

3450405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3450405 is a deficient number, since it is larger than the sum of its proper divisors (3233499).

3450405 is a wasteful number, since it uses less digits than its factorization.

3450405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 3450405 is about 1857.5265812365. The cubic root of 3450405 is about 151.1088932817.

Adding to 3450405 its reverse (5040543), we get a palindrome (8490948).

The spelling of 3450405 in words is "three million, four hundred fifty thousand, four hundred five".