1251453706428 has 12 divisors (see below), whose sum is σ = 2920058648360. Its totient is φ = 417151235472.

The previous prime is 1251453706427. The next prime is 1251453706501. The reversal of 1251453706428 is 8246073541521.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1251453706428² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251453706427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52143904423 + ... + 52143904446.

Almost surely, 2^{1251453706428} is an apocalyptic number.

It is an amenable number.

1251453706428 is an abundant number, since it is smaller than the sum of its proper divisors (1668604941932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251453706428 is a wasteful number, since it uses less digits than its factorization.

1251453706428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104287808876 (or 104287808874 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 1251453706428 in words is "one trillion, two hundred fifty-one billion, four hundred fifty-three million, seven hundred six thousand, four hundred twenty-eight".