2945641 has 4 divisors (see below), whose sum is σ = 3118932. Its totient is φ = 2772352.

The previous prime is 2945639. The next prime is 2945647. The reversal of 2945641 is 1465492.

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 2560000 + 385641 = 1600^2 + 621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2945641 - 2¹ = 2945639 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2945647) 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, 86620 + ... + 86653.

It is an arithmetic number, because the mean of its divisors is an integer number (779733).

2^2945641 is an apocalyptic number.

It is an amenable number.

2945641 is a deficient number, since it is larger than the sum of its proper divisors (173291).

2945641 is a wasteful number, since it uses less digits than its factorization.

2945641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173290.

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

The square root of 2945641 is about 1716.2869806649. The cubic root of 2945641 is about 143.3485393398.

The spelling of 2945641 in words is "two million, nine hundred forty-five thousand, six hundred forty-one".