2720361 has 16 divisors (see below), whose sum is σ = 4169088. Its totient is φ = 1545600.

The previous prime is 2720359. The next prime is 2720381. The reversal of 2720361 is 1630272.

It is a happy number.

It is not a de Polignac number, because 2720361 - 2¹ = 2720359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2720321) 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, 5671 + ... + 6131.

It is an arithmetic number, because the mean of its divisors is an integer number (260568).

2^2720361 is an apocalyptic number.

2720361 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2720361 is a deficient number, since it is larger than the sum of its proper divisors (1448727).

2720361 is a wasteful number, since it uses less digits than its factorization.

2720361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2720361 is about 1649.3516908167. The cubic root of 2720361 is about 139.5968161823.

It can be divided in two parts, 2720 and 361, that added together give a triangular number (3081 = T₇₈).

The spelling of 2720361 in words is "two million, seven hundred twenty thousand, three hundred sixty-one".