2621545 has 4 divisors (see below), whose sum is σ = 3145860. Its totient is φ = 2097232.

The previous prime is 2621527. The next prime is 2621551. The reversal of 2621545 is 5451262.

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 1929321 + 692224 = 1389^2 + 832^2 .

It is a cyclic number.

It is not a de Polignac number, because 2621545 - 2⁹ = 2621033 is a prime.

2621545 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262150 + ... + 262159.

It is an arithmetic number, because the mean of its divisors is an integer number (786465).

2^2621545 is an apocalyptic number.

It is an amenable number.

2621545 is a deficient number, since it is larger than the sum of its proper divisors (524315).

2621545 is an equidigital number, since it uses as much as digits as its factorization.

2621545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524314.

The product of its digits is 2400, while the sum is 25.

The square root of 2621545 is about 1619.1185873802. The cubic root of 2621545 is about 137.8856610851.

The spelling of 2621545 in words is "two million, six hundred twenty-one thousand, five hundred forty-five".