3720551 has 2 divisors, whose sum is σ = 3720552. Its totient is φ = 3720550.

The previous prime is 3720511. The next prime is 3720553. The reversal of 3720551 is 1550273.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3720551 - 2⁶ = 3720487 is a prime.

It is a super-3 number, since 3×3720551³ (a number of 21 digits) contains 333 as substring.

Together with 3720553, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3720553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1860275 + 1860276.

It is an arithmetic number, because the mean of its divisors is an integer number (1860276).

Almost surely, 2^3720551 is an apocalyptic number.

3720551 is a deficient number, since it is larger than the sum of its proper divisors (1).

3720551 is an equidigital number, since it uses as much as digits as its factorization.

3720551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 3720551 is about 1928.8729870056. The cubic root of 3720551 is about 154.9538676446.

The spelling of 3720551 in words is "three million, seven hundred twenty thousand, five hundred fifty-one".