2907945 has 12 divisors (see below), whose sum is σ = 5040516. Its totient is φ = 1550880.

The previous prime is 2907943. The next prime is 2907953. The reversal of 2907945 is 5497092.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 2518569 = 624^2 + 1587^2 .

It is not a de Polignac number, because 2907945 - 2¹ = 2907943 is a prime.

It is a super-2 number, since 2×2907945² = 16912288246050, which contains 22 as substring.

2907945 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2907943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32266 + ... + 32355.

It is an arithmetic number, because the mean of its divisors is an integer number (420043).

2^2907945 is an apocalyptic number.

It is an amenable number.

2907945 is a deficient number, since it is larger than the sum of its proper divisors (2132571).

2907945 is a wasteful number, since it uses less digits than its factorization.

2907945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64632 (or 64629 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 2907945 is about 1705.2697733790. The cubic root of 2907945 is about 142.7344248503.

The spelling of 2907945 in words is "two million, nine hundred seven thousand, nine hundred forty-five".