2620745 has 4 divisors (see below), whose sum is σ = 3144900. Its totient is φ = 2096592.

The previous prime is 2620741. The next prime is 2620811. The reversal of 2620745 is 5470262.

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 719104 + 1901641 = 848^2 + 1379^2 .

It is a cyclic number.

It is not a de Polignac number, because 2620745 - 2² = 2620741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2620741) 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, 262070 + ... + 262079.

It is an arithmetic number, because the mean of its divisors is an integer number (786225).

2^2620745 is an apocalyptic number.

It is an amenable number.

2620745 is a deficient number, since it is larger than the sum of its proper divisors (524155).

2620745 is an equidigital number, since it uses as much as digits as its factorization.

2620745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524154.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2620745 is about 1618.8715205352. The cubic root of 2620745 is about 137.8716337651.

The spelling of 2620745 in words is "two million, six hundred twenty thousand, seven hundred forty-five".