3730621 has 4 divisors (see below), whose sum is σ = 3757600. Its totient is φ = 3703644.

The previous prime is 3730619. The next prime is 3730651. The reversal of 3730621 is 1260373.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1260373 = 43 ⋅29311.

It is a cyclic number.

It is not a de Polignac number, because 3730621 - 2¹ = 3730619 is a prime.

It is a Duffinian number.

3730621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3730592 and 3730601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3730651) 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, 13281 + ... + 13558.

It is an arithmetic number, because the mean of its divisors is an integer number (939400).

Almost surely, 2^3730621 is an apocalyptic number.

It is an amenable number.

3730621 is a deficient number, since it is larger than the sum of its proper divisors (26979).

3730621 is a wasteful number, since it uses less digits than its factorization.

3730621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 3730621 is about 1931.4815556976. The cubic root of 3730621 is about 155.0935404858.

Adding to 3730621 its reverse (1260373), we get a palindrome (4990994).

The spelling of 3730621 in words is "three million, seven hundred thirty thousand, six hundred twenty-one".