4145405 has 32 divisors (see below), whose sum is σ = 5909760. Its totient is φ = 2759680.

The previous prime is 4145389. The next prime is 4145419. The reversal of 4145405 is 5045414.

It is not a de Polignac number, because 4145405 - 2⁴ = 4145389 is a prime.

It is a super-2 number, since 2×4145405² = 34368765228050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36629 + ... + 36741.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

Almost surely, 2^4145405 is an apocalyptic number.

It is an amenable number.

4145405 is a deficient number, since it is larger than the sum of its proper divisors (1764355).

4145405 is a wasteful number, since it uses less digits than its factorization.

4145405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4145405 is about 2036.0267679969. The cubic root of 4145405 is about 160.6407250423.

Subtracting 4145405 from its reverse (5045414), we obtain a palindrome (900009).

It can be divided in two parts, 414 and 5405, that multiplied together give a triangular number (2237670 = T₂₁₁₅).

The spelling of 4145405 in words is "four million, one hundred forty-five thousand, four hundred five".