4001205145 has 16 divisors (see below), whose sum is σ = 5489388288. Its totient is φ = 2742672960.

The previous prime is 4001205127. The next prime is 4001205157. The reversal of 4001205145 is 5415021004.

It is not a de Polignac number, because 4001205145 - 2⁹ = 4001204633 is a prime.

It is a super-2 number, since 2×4001205145² = 32019285224748942050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82500 + ... + 121690.

It is an arithmetic number, because the mean of its divisors is an integer number (343086768).

Almost surely, 2^4001205145 is an apocalyptic number.

It is an amenable number.

4001205145 is a deficient number, since it is larger than the sum of its proper divisors (1488183143).

4001205145 is a wasteful number, since it uses less digits than its factorization.

4001205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42120.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 4001205145 is about 63255.0799936258. The cubic root of 4001205145 is about 1587.5604566639.

Adding to 4001205145 its reverse (5415021004), we get a palindrome (9416226149).

The spelling of 4001205145 in words is "four billion, one million, two hundred five thousand, one hundred forty-five".