3631145 has 12 divisors (see below), whose sum is σ = 5069124. Its totient is φ = 2489760.

The previous prime is 3631141. The next prime is 3631163. The reversal of 3631145 is 5411363.

It is a happy number.

3631145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1449616 + 2181529 = 1204^2 + 1477^2 .

It is not a de Polignac number, because 3631145 - 2² = 3631141 is a prime.

It is a super-2 number, since 2×3631145² = 26370428022050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3631145.

It is not an unprimeable number, because it can be changed into a prime (3631141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7166 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (422427).

Almost surely, 2^3631145 is an apocalyptic number.

3631145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3631145 is a deficient number, since it is larger than the sum of its proper divisors (1437979).

3631145 is a wasteful number, since it uses less digits than its factorization.

3631145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840 (or 14833 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 3631145 is about 1905.5563492062. The cubic root of 3631145 is about 153.7025940613.

The spelling of 3631145 in words is "three million, six hundred thirty-one thousand, one hundred forty-five".