1401501611 has 2 divisors, whose sum is σ = 1401501612. Its totient is φ = 1401501610.

The previous prime is 1401501593. The next prime is 1401501613. The reversal of 1401501611 is 1161051041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401501611 is a prime.

Together with 1401501613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1401501613) 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, 700750805 + 700750806.

It is an arithmetic number, because the mean of its divisors is an integer number (700750806).

Almost surely, 2^1401501611 is an apocalyptic number.

1401501611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401501611 is an equidigital number, since it uses as much as digits as its factorization.

1401501611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 1401501611 is about 37436.6346110331. The cubic root of 1401501611 is about 1119.0887600321.

Adding to 1401501611 its reverse (1161051041), we get a palindrome (2562552652).

The spelling of 1401501611 in words is "one billion, four hundred one million, five hundred one thousand, six hundred eleven".