3755621 has 2 divisors, whose sum is σ = 3755622. Its totient is φ = 3755620.

The previous prime is 3755617. The next prime is 3755627. The reversal of 3755621 is 1265573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 828100 = 1711^2 + 910^2 .

It is an emirp because it is prime and its reverse (1265573) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3755621 - 2² = 3755617 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3755627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1877810 + 1877811.

It is an arithmetic number, because the mean of its divisors is an integer number (1877811).

Almost surely, 2^3755621 is an apocalyptic number.

It is an amenable number.

3755621 is a deficient number, since it is larger than the sum of its proper divisors (1).

3755621 is an equidigital number, since it uses as much as digits as its factorization.

3755621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 29.

The square root of 3755621 is about 1937.9424656062. The cubic root of 3755621 is about 155.4392121177.

The spelling of 3755621 in words is "three million, seven hundred fifty-five thousand, six hundred twenty-one".