402516241 has 2 divisors, whose sum is σ = 402516242. Its totient is φ = 402516240.

The previous prime is 402516239. The next prime is 402516251. The reversal of 402516241 is 142615204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400160016 + 2356225 = 20004^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 402516241 - 2¹ = 402516239 is a prime.

Together with 402516239, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402516221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201258120 + 201258121.

It is an arithmetic number, because the mean of its divisors is an integer number (201258121).

Almost surely, 2^402516241 is an apocalyptic number.

It is an amenable number.

402516241 is a deficient number, since it is larger than the sum of its proper divisors (1).

402516241 is an equidigital number, since it uses as much as digits as its factorization.

402516241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 402516241 is about 20062.8074057446. The cubic root of 402516241 is about 738.3480565571.

The spelling of 402516241 in words is "four hundred two million, five hundred sixteen thousand, two hundred forty-one".