3280145 has 16 divisors (see below), whose sum is σ = 4482432. Its totient is φ = 2280960.

The previous prime is 3280139. The next prime is 3280157. The reversal of 3280145 is 5410823.

It is a de Polignac number, because none of the positive numbers 2^k-3280145 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3280145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32 + ... + 2561.

It is an arithmetic number, because the mean of its divisors is an integer number (280152).

Almost surely, 2^3280145 is an apocalyptic number.

It is an amenable number.

3280145 is a deficient number, since it is larger than the sum of its proper divisors (1202287).

3280145 is a wasteful number, since it uses less digits than its factorization.

3280145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2632.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 3280145 is about 1811.1170586133. The cubic root of 3280145 is about 148.5813662256.

Adding to 3280145 its reverse (5410823), we get a palindrome (8690968).

The spelling of 3280145 in words is "three million, two hundred eighty thousand, one hundred forty-five".