40002555 has 16 divisors (see below), whose sum is σ = 66069504. Its totient is φ = 20646240.

The previous prime is 40002491. The next prime is 40002559. The reversal of 40002555 is 55520004.

It is not a de Polignac number, because 40002555 - 2⁶ = 40002491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40002559) 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, 42549 + ... + 43478.

It is an arithmetic number, because the mean of its divisors is an integer number (4129344).

Almost surely, 2^40002555 is an apocalyptic number.

40002555 is a deficient number, since it is larger than the sum of its proper divisors (26066949).

40002555 is a wasteful number, since it uses less digits than its factorization.

40002555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86066.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 40002555 is about 6324.7573075969. The cubic root of 40002555 is about 342.0024708279.

Adding to 40002555 its reverse (55520004), we get a palindrome (95522559).

It can be divided in two parts, 4000 and 2555, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 40002555 in words is "forty million, two thousand, five hundred fifty-five".