40502101 has 2 divisors, whose sum is σ = 40502102. Its totient is φ = 40502100.

The previous prime is 40502081. The next prime is 40502107. The reversal of 40502101 is 10120504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20921476 + 19580625 = 4574^2 + 4425^2 .

It is a cyclic number.

It is not a de Polignac number, because 40502101 - 2⁵ = 40502069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40502107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20251050 + 20251051.

It is an arithmetic number, because the mean of its divisors is an integer number (20251051).

Almost surely, 2^40502101 is an apocalyptic number.

It is an amenable number.

40502101 is a deficient number, since it is larger than the sum of its proper divisors (1).

40502101 is an equidigital number, since it uses as much as digits as its factorization.

40502101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 40502101 is about 6364.1260986879. The cubic root of 40502101 is about 343.4202110451.

Adding to 40502101 its reverse (10120504), we get a palindrome (50622605).

The spelling of 40502101 in words is "forty million, five hundred two thousand, one hundred one".