402542302501 has 4 divisors (see below), whose sum is σ = 402549825132. Its totient is φ = 402534779872.

The previous prime is 402542302471. The next prime is 402542302531. The reversal of 402542302501 is 105203245204.

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

It is an interprime number because it is at equal distance from previous prime (402542302471) and next prime (402542302531).

It can be written as a sum of positive squares in 2 ways, for example, as 272635401025 + 129906901476 = 522145^2 + 360426^2 .

It is a cyclic number.

It is not a de Polignac number, because 402542302501 - 2⁵ = 402542302469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402542302501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402542302531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3680470 + ... + 3788263.

It is an arithmetic number, because the mean of its divisors is an integer number (100637456283).

Almost surely, 2^402542302501 is an apocalyptic number.

It is an amenable number.

402542302501 is a deficient number, since it is larger than the sum of its proper divisors (7522631).

402542302501 is an equidigital number, since it uses as much as digits as its factorization.

402542302501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7522630.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 402542302501 its reverse (105203245204), we get a palindrome (507745547705).

The spelling of 402542302501 in words is "four hundred two billion, five hundred forty-two million, three hundred two thousand, five hundred one".