3480021 has 24 divisors (see below), whose sum is σ = 5416320. Its totient is φ = 2146176.

The previous prime is 3480017. The next prime is 3480031. The reversal of 3480021 is 1200843.

It is a happy number.

It is not a de Polignac number, because 3480021 - 2² = 3480017 is a prime.

It is a super-2 number, since 2×3480021² = 24221092320882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3479976 and 3480003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3480011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7821 + ... + 8253.

It is an arithmetic number, because the mean of its divisors is an integer number (225680).

Almost surely, 2^3480021 is an apocalyptic number.

It is an amenable number.

3480021 is a deficient number, since it is larger than the sum of its proper divisors (1936299).

3480021 is a wasteful number, since it uses less digits than its factorization.

3480021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3480021 is about 1865.4814392001. The cubic root of 3480021 is about 151.5400018541.

Adding to 3480021 its reverse (1200843), we get a palindrome (4680864).

The spelling of 3480021 in words is "three million, four hundred eighty thousand, twenty-one".