2401309 has 4 divisors (see below), whose sum is σ = 2428380. Its totient is φ = 2374240.

The previous prime is 2401307. The next prime is 2401339. The reversal of 2401309 is 9031042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 356409 + 2044900 = 597^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401309 - 2¹ = 2401307 is a prime.

It is a Duffinian number.

2401309 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2401303) 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, 13402 + ... + 13579.

It is an arithmetic number, because the mean of its divisors is an integer number (607095).

2^2401309 is an apocalyptic number.

It is an amenable number.

2401309 is a deficient number, since it is larger than the sum of its proper divisors (27071).

2401309 is an equidigital number, since it uses as much as digits as its factorization.

2401309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27070.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 2401309 is about 1549.6157588254. The cubic root of 2401309 is about 133.9109269183.

The spelling of 2401309 in words is "two million, four hundred one thousand, three hundred nine".