1251420451143 has 16 divisors (see below), whose sum is σ = 1706716093536. Its totient is φ = 815376781440.

The previous prime is 1251420451123. The next prime is 1251420451153. The reversal of 1251420451143 is 3411540241521.

It is not a de Polignac number, because 1251420451143 - 2⁸ = 1251420450887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251420451123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21749496 + ... + 21806957.

It is an arithmetic number, because the mean of its divisors is an integer number (106669755846).

Almost surely, 2^{1251420451143} is an apocalyptic number.

1251420451143 is a deficient number, since it is larger than the sum of its proper divisors (455295642393).

1251420451143 is a wasteful number, since it uses less digits than its factorization.

1251420451143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43556674.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 1251420451143 its reverse (3411540241521), we get a palindrome (4662960692664).

The spelling of 1251420451143 in words is "one trillion, two hundred fifty-one billion, four hundred twenty million, four hundred fifty-one thousand, one hundred forty-three".