3521040 has 80 divisors (see below), whose sum is σ = 11570688. Its totient is φ = 882688.

The previous prime is 3521033. The next prime is 3521053. The reversal of 3521040 is 401253.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 3649 + ... + 4511.

Almost surely, 2^3521040 is an apocalyptic number.

3521040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3521040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5785344).

3521040 is an abundant number, since it is smaller than the sum of its proper divisors (8049648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521040 is a wasteful number, since it uses less digits than its factorization.

3521040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3521040 is about 1876.4434443915. The cubic root of 3521040 is about 152.1330782831.

Adding to 3521040 its reverse (401253), we get a palindrome (3922293).

The spelling of 3521040 in words is "three million, five hundred twenty-one thousand, forty".