4207491 has 8 divisors (see below), whose sum is σ = 6233360. Its totient is φ = 2804976.

The previous prime is 4207481. The next prime is 4207571. The reversal of 4207491 is 1947024.

It is a happy number.

It is not a de Polignac number, because 4207491 - 2¹⁷ = 4076419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 155833 = 4207491 / (4 + 2 + 0 + 7 + 4 + 9 + 1).

It is a d-powerful number, because it can be written as 4⁶ + 2⁷ + 0 + 7⁴ + 4¹¹ + 9⁴ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4207471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77890 + ... + 77943.

It is an arithmetic number, because the mean of its divisors is an integer number (779170).

Almost surely, 2^4207491 is an apocalyptic number.

4207491 is a deficient number, since it is larger than the sum of its proper divisors (2025869).

4207491 is a wasteful number, since it uses less digits than its factorization.

4207491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155842 (or 155836 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 4207491 is about 2051.2169558582. The cubic root of 4207491 is about 161.4387298054.

The spelling of 4207491 in words is "four million, two hundred seven thousand, four hundred ninety-one".