402401128501 has 2 divisors, whose sum is σ = 402401128502. Its totient is φ = 402401128500.

The previous prime is 402401128487. The next prime is 402401128529. The reversal of 402401128501 is 105821104204.

It is an a-pointer prime, because the next prime (402401128529) can be obtained adding 402401128501 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 377948300625 + 24452827876 = 614775^2 + 156374^2 .

It is a cyclic number.

It is not a de Polignac number, because 402401128501 - 2⁵ = 402401128469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 402401128501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402401128901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201200564250 + 201200564251.

It is an arithmetic number, because the mean of its divisors is an integer number (201200564251).

Almost surely, 2^402401128501 is an apocalyptic number.

It is an amenable number.

402401128501 is a deficient number, since it is larger than the sum of its proper divisors (1).

402401128501 is an equidigital number, since it uses as much as digits as its factorization.

402401128501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 402401128501 in words is "four hundred two billion, four hundred one million, one hundred twenty-eight thousand, five hundred one".