1850402401 has 2 divisors, whose sum is σ = 1850402402. Its totient is φ = 1850402400.

The previous prime is 1850402399. The next prime is 1850402429. The reversal of 1850402401 is 1042040581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1848914001 + 1488400 = 42999^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850402401 - 2¹ = 1850402399 is a prime.

Together with 1850402399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1850402501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925201200 + 925201201.

It is an arithmetic number, because the mean of its divisors is an integer number (925201201).

Almost surely, 2^1850402401 is an apocalyptic number.

It is an amenable number.

1850402401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850402401 is an equidigital number, since it uses as much as digits as its factorization.

1850402401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 1850402401 is about 43016.3038974759. The cubic root of 1850402401 is about 1227.6900265648.

Adding to 1850402401 its reverse (1042040581), we get a palindrome (2892442982).

The spelling of 1850402401 in words is "one billion, eight hundred fifty million, four hundred two thousand, four hundred one".