4009045 has 4 divisors (see below), whose sum is σ = 4810860. Its totient is φ = 3207232.

The previous prime is 4009039. The next prime is 4009051. The reversal of 4009045 is 5409004.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4009039) and next prime (4009051).

It can be written as a sum of positive squares in 2 ways, for example, as 3104644 + 904401 = 1762^2 + 951^2 .

It is a cyclic number.

It is not a de Polignac number, because 4009045 - 2³ = 4009037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400900 + ... + 400909.

It is an arithmetic number, because the mean of its divisors is an integer number (1202715).

Almost surely, 2^4009045 is an apocalyptic number.

It is an amenable number.

4009045 is a deficient number, since it is larger than the sum of its proper divisors (801815).

4009045 is an equidigital number, since it uses as much as digits as its factorization.

4009045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801814.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4009045 is about 2002.2599731304. The cubic root of 4009045 is about 158.8596654778.

It can be divided in two parts, 40090 and 45, that multiplied together give a triangular number (1804050 = T₁₈₉₉).

The spelling of 4009045 in words is "four million, nine thousand, forty-five".