2401685021 has 2 divisors, whose sum is σ = 2401685022. Its totient is φ = 2401685020.

The previous prime is 2401685017. The next prime is 2401685023. The reversal of 2401685021 is 1205861042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2305056121 + 96628900 = 48011^2 + 9830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2401685021 - 2² = 2401685017 is a prime.

Together with 2401685023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2401685023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200842510 + 1200842511.

It is an arithmetic number, because the mean of its divisors is an integer number (1200842511).

Almost surely, 2^2401685021 is an apocalyptic number.

It is an amenable number.

2401685021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2401685021 is an equidigital number, since it uses as much as digits as its factorization.

2401685021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2401685021 is about 49006.9895117013. The cubic root of 2401685021 is about 1339.1791625791.

The spelling of 2401685021 in words is "two billion, four hundred one million, six hundred eighty-five thousand, twenty-one".