3954509 has 4 divisors (see below), whose sum is σ = 4258716. Its totient is φ = 3650304.

The previous prime is 3954499. The next prime is 3954529. The reversal of 3954509 is 9054593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9054593 = 89 ⋅101737.

It can be written as a sum of positive squares in 2 ways, for example, as 902500 + 3052009 = 950^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 3954509 - 2⁴ = 3954493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3954529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152084 + ... + 152109.

It is an arithmetic number, because the mean of its divisors is an integer number (1064679).

Almost surely, 2^3954509 is an apocalyptic number.

It is an amenable number.

3954509 is a deficient number, since it is larger than the sum of its proper divisors (304207).

3954509 is a wasteful number, since it uses less digits than its factorization.

3954509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304206.

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 3954509 is about 1988.5947299538. The cubic root of 3954509 is about 158.1360389008.

The spelling of 3954509 in words is "three million, nine hundred fifty-four thousand, five hundred nine".