1251854028 has 120 divisors (see below), whose sum is σ = 3525688320. Its totient is φ = 386195040.

The previous prime is 1251854003. The next prime is 1251854039. The reversal of 1251854028 is 8204581521.

1251854028 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1251853983 and 1251854001.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 228303 + ... + 233721.

It is an arithmetic number, because the mean of its divisors is an integer number (29380736).

Almost surely, 2^1251854028 is an apocalyptic number.

1251854028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251854028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1762844160).

1251854028 is an abundant number, since it is smaller than the sum of its proper divisors (2273834292).

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

1251854028 is a wasteful number, since it uses less digits than its factorization.

1251854028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 1251854028 is about 35381.5492594657. The cubic root of 1251854028 is about 1077.7496662176.

The spelling of 1251854028 in words is "one billion, two hundred fifty-one million, eight hundred fifty-four thousand, twenty-eight".