2649145 has 4 divisors (see below), whose sum is σ = 3178980. Its totient is φ = 2119312.

The previous prime is 2649139. The next prime is 2649173. The reversal of 2649145 is 5419462.

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 609961 + 2039184 = 781^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 2649145 - 2³ = 2649137 is a prime.

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, 264910 + ... + 264919.

It is an arithmetic number, because the mean of its divisors is an integer number (794745).

2^2649145 is an apocalyptic number.

It is an amenable number.

2649145 is a deficient number, since it is larger than the sum of its proper divisors (529835).

2649145 is an equidigital number, since it uses as much as digits as its factorization.

2649145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529834.

The product of its digits is 8640, while the sum is 31.

The square root of 2649145 is about 1627.6194272618. The cubic root of 2649145 is about 138.3678660904.

It can be divided in two parts, 264 and 9145, that added together give a square (9409 = 97²).

The spelling of 2649145 in words is "two million, six hundred forty-nine thousand, one hundred forty-five".