4000242545 has 16 divisors (see below), whose sum is σ = 5473636560. Its totient is φ = 2780258304.

The previous prime is 4000242541. The next prime is 4000242551. The reversal of 4000242545 is 5452420004.

It can be written as a sum of positive squares in 8 ways, for example, as 33258289 + 3966984256 = 5767^2 + 62984^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000242545 - 2² = 4000242541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4000242541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1808960 + ... + 1811169.

It is an arithmetic number, because the mean of its divisors is an integer number (342102285).

Almost surely, 2^4000242545 is an apocalyptic number.

It is an amenable number.

4000242545 is a deficient number, since it is larger than the sum of its proper divisors (1473394015).

4000242545 is a wasteful number, since it uses less digits than its factorization.

4000242545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620164.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 4000242545 is about 63247.4706608889. The cubic root of 4000242545 is about 1587.4331360021.

Adding to 4000242545 its reverse (5452420004), we get a palindrome (9452662549).

The spelling of 4000242545 in words is "four billion, two hundred forty-two thousand, five hundred forty-five".