1451123911 has 2 divisors, whose sum is σ = 1451123912. Its totient is φ = 1451123910.

The previous prime is 1451123909. The next prime is 1451123923. The reversal of 1451123911 is 1193211541.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1451123911 - 2¹ = 1451123909 is a prime.

Together with 1451123909, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1451123911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1451183911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 725561955 + 725561956.

It is an arithmetic number, because the mean of its divisors is an integer number (725561956).

Almost surely, 2^1451123911 is an apocalyptic number.

1451123911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1451123911 is an equidigital number, since it uses as much as digits as its factorization.

1451123911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 28.

The square root of 1451123911 is about 38093.6203451444. The cubic root of 1451123911 is about 1132.1435572223.

The spelling of 1451123911 in words is "one billion, four hundred fifty-one million, one hundred twenty-three thousand, nine hundred eleven".