1401156611 has 2 divisors, whose sum is σ = 1401156612. Its totient is φ = 1401156610.

The previous prime is 1401156521. The next prime is 1401156613. The reversal of 1401156611 is 1166511041.

It is a strong prime.

It is an emirp because it is prime and its reverse (1166511041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1401156611 - 2¹⁴ = 1401140227 is a prime.

Together with 1401156613, 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 (1401156613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700578305 + 700578306.

It is an arithmetic number, because the mean of its divisors is an integer number (700578306).

Almost surely, 2^1401156611 is an apocalyptic number.

1401156611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401156611 is an equidigital number, since it uses as much as digits as its factorization.

1401156611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1401156611 is about 37432.0265414524. The cubic root of 1401156611 is about 1118.9969258395.

Adding to 1401156611 its reverse (1166511041), we get a palindrome (2567667652).

The spelling of 1401156611 in words is "one billion, four hundred one million, one hundred fifty-six thousand, six hundred eleven".