3642637 has 4 divisors (see below), whose sum is σ = 3711420. Its totient is φ = 3573856.

The previous prime is 3642631. The next prime is 3642643. The reversal of 3642637 is 7362463.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (3642631) and next prime (3642643).

It can be written as a sum of positive squares in 2 ways, for example, as 2452356 + 1190281 = 1566^2 + 1091^2 .

It is a cyclic number.

It is not a de Polignac number, because 3642637 - 2³ = 3642629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3642599 and 3642608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3642631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34312 + ... + 34417.

It is an arithmetic number, because the mean of its divisors is an integer number (927855).

Almost surely, 2^3642637 is an apocalyptic number.

It is an amenable number.

3642637 is a deficient number, since it is larger than the sum of its proper divisors (68783).

3642637 is an equidigital number, since it uses as much as digits as its factorization.

3642637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68782.

The product of its digits is 18144, while the sum is 31.

The square root of 3642637 is about 1908.5693594942. The cubic root of 3642637 is about 153.8645714425.

It can be divided in two parts, 36426 and 37, that added together give a palindrome (36463).

The spelling of 3642637 in words is "three million, six hundred forty-two thousand, six hundred thirty-seven".