4145551 has 4 divisors (see below), whose sum is σ = 4246704. Its totient is φ = 4044400.

The previous prime is 4145549. The next prime is 4145567. The reversal of 4145551 is 1555414.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4145551 - 2¹ = 4145549 is a prime.

It is a Duffinian number.

4145551 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4145851) 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, 50515 + ... + 50596.

It is an arithmetic number, because the mean of its divisors is an integer number (1061676).

Almost surely, 2^4145551 is an apocalyptic number.

4145551 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4145551 is a deficient number, since it is larger than the sum of its proper divisors (101153).

4145551 is a wasteful number, since it uses less digits than its factorization.

4145551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101152.

The product of its digits is 2000, while the sum is 25.

The square root of 4145551 is about 2036.0626218267. The cubic root of 4145551 is about 160.6426109272.

The spelling of 4145551 in words is "four million, one hundred forty-five thousand, five hundred fifty-one".