3720651 has 16 divisors (see below), whose sum is σ = 5587968. Its totient is φ = 2181600.

The previous prime is 3720649. The next prime is 3720667. The reversal of 3720651 is 1560273.

It is not a de Polignac number, because 3720651 - 2¹ = 3720649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3720151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796 + ... + 2841.

It is an arithmetic number, because the mean of its divisors is an integer number (349248).

Almost surely, 2^3720651 is an apocalyptic number.

3720651 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3720651 is a deficient number, since it is larger than the sum of its proper divisors (1867317).

3720651 is a wasteful number, since it uses less digits than its factorization.

3720651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 3720651 is about 1928.8989087041. The cubic root of 3720651 is about 154.9552559021.

It can be divided in two parts, 3720 and 651, that added together give a triangular number (4371 = T₉₃).

The spelling of 3720651 in words is "three million, seven hundred twenty thousand, six hundred fifty-one".