4207945 has 16 divisors (see below), whose sum is σ = 5829120. Its totient is φ = 2856384.

The previous prime is 4207943. The next prime is 4207961. The reversal of 4207945 is 5497024.

It is a cyclic number.

It is not a de Polignac number, because 4207945 - 2¹ = 4207943 is a prime.

It is a super-2 number, since 2×4207945² = 35413602246050, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (4207943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3264 + ... + 4366.

It is an arithmetic number, because the mean of its divisors is an integer number (364320).

Almost surely, 2^4207945 is an apocalyptic number.

It is an amenable number.

4207945 is a deficient number, since it is larger than the sum of its proper divisors (1621175).

4207945 is a wasteful number, since it uses less digits than its factorization.

4207945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 4207945 is about 2051.3276188849. The cubic root of 4207945 is about 161.4445361594. Note that the first 3 decimals are identical.

It can be divided in two parts, 42079 and 45, that added together give a palindrome (42124).

The spelling of 4207945 in words is "four million, two hundred seven thousand, nine hundred forty-five".