1251102451 has 2 divisors, whose sum is σ = 1251102452. Its totient is φ = 1251102450.

The previous prime is 1251102449. The next prime is 1251102467. The reversal of 1251102451 is 1542011521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251102451 - 2¹ = 1251102449 is a prime.

Together with 1251102449, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1251102401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625551225 + 625551226.

It is an arithmetic number, because the mean of its divisors is an integer number (625551226).

Almost surely, 2^1251102451 is an apocalyptic number.

1251102451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251102451 is an equidigital number, since it uses as much as digits as its factorization.

1251102451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 1251102451 is about 35370.9266347377. The cubic root of 1251102451 is about 1077.5339397832.

Adding to 1251102451 its reverse (1542011521), we get a palindrome (2793113972).

The spelling of 1251102451 in words is "one billion, two hundred fifty-one million, one hundred two thousand, four hundred fifty-one".