2451345121 has 2 divisors, whose sum is σ = 2451345122. Its totient is φ = 2451345120.

The previous prime is 2451345109. The next prime is 2451345139. The reversal of 2451345121 is 1215431542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907942400 + 543402721 = 43680^2 + 23311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2451345121 - 2²⁹ = 1914474209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2451345121.

It is not a weakly prime, because it can be changed into another prime (2451345191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1225672560 + 1225672561.

It is an arithmetic number, because the mean of its divisors is an integer number (1225672561).

Almost surely, 2^2451345121 is an apocalyptic number.

It is an amenable number.

2451345121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2451345121 is an equidigital number, since it uses as much as digits as its factorization.

2451345121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 28.

The square root of 2451345121 is about 49511.0605925585. The cubic root of 2451345121 is about 1348.3464200271.

Adding to 2451345121 its reverse (1215431542), we get a palindrome (3666776663).

The spelling of 2451345121 in words is "two billion, four hundred fifty-one million, three hundred forty-five thousand, one hundred twenty-one".