1156612001 has 2 divisors, whose sum is σ = 1156612002. Its totient is φ = 1156612000.

The previous prime is 1156611943. The next prime is 1156612003. The reversal of 1156612001 is 1002166511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1013785600 + 142826401 = 31840^2 + 11951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1156612001 is a prime.

It is a Sophie Germain prime.

Together with 1156612003, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1156612003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578306000 + 578306001.

It is an arithmetic number, because the mean of its divisors is an integer number (578306001).

Almost surely, 2^1156612001 is an apocalyptic number.

It is an amenable number.

1156612001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156612001 is an equidigital number, since it uses as much as digits as its factorization.

1156612001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1156612001 is about 34008.9988238407. The cubic root of 1156612001 is about 1049.6936373018.

Adding to 1156612001 its reverse (1002166511), we get a palindrome (2158778512).

The spelling of 1156612001 in words is "one billion, one hundred fifty-six million, six hundred twelve thousand, one".