3521970 has 24 divisors (see below), whose sum is σ = 9157356. Its totient is φ = 939168.

The previous prime is 3521953. The next prime is 3521977. The reversal of 3521970 is 791253.

It can be written as a sum of positive squares in 2 ways, for example, as 3337929 + 184041 = 1827^2 + 429^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3521977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19477 + ... + 19656.

Almost surely, 2^3521970 is an apocalyptic number.

3521970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3521970 is an abundant number, since it is smaller than the sum of its proper divisors (5635386).

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

3521970 is a wasteful number, since it uses less digits than its factorization.

3521970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39146 (or 39143 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 3521970 is about 1876.6912372577. The cubic root of 3521970 is about 152.1464712303.

The spelling of 3521970 in words is "three million, five hundred twenty-one thousand, nine hundred seventy".