1251122455 has 24 divisors (see below), whose sum is σ = 1661436000. Its totient is φ = 903735360.

The previous prime is 1251122449. The next prime is 1251122461. The reversal of 1251122455 is 5542211521.

It is an interprime number because it is at equal distance from previous prime (1251122449) and next prime (1251122461).

It is not a de Polignac number, because 1251122455 - 2²¹ = 1249025303 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83206 + ... + 97084.

It is an arithmetic number, because the mean of its divisors is an integer number (69226500).

Almost surely, 2^1251122455 is an apocalyptic number.

1251122455 is a deficient number, since it is larger than the sum of its proper divisors (410313545).

1251122455 is a wasteful number, since it uses less digits than its factorization.

1251122455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055 (or 14044 counting only the distinct ones).

The product of its digits is 4000, while the sum is 28.

The square root of 1251122455 is about 35371.2094082179. The cubic root of 1251122455 is about 1077.5396826846.

Adding to 1251122455 its reverse (5542211521), we get a palindrome (6793333976).

The spelling of 1251122455 in words is "one billion, two hundred fifty-one million, one hundred twenty-two thousand, four hundred fifty-five".