1251349038 has 48 divisors (see below), whose sum is σ = 2803507200. Its totient is φ = 402970320.

The previous prime is 1251349031. The next prime is 1251349049. The reversal of 1251349038 is 8309431521.

1251349038 is a `hidden beast` number, since 125 + 13 + 490 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1251348993 and 1251349011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251349031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 399643 + ... + 402761.

It is an arithmetic number, because the mean of its divisors is an integer number (58406400).

Almost surely, 2^1251349038 is an apocalyptic number.

1251349038 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251349038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1401753600).

1251349038 is an abundant number, since it is smaller than the sum of its proper divisors (1552158162).

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

1251349038 is a wasteful number, since it uses less digits than its factorization.

1251349038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3877 (or 3874 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 1251349038 is about 35374.4121929962. The cubic root of 1251349038 is about 1077.6047275930.

The spelling of 1251349038 in words is "one billion, two hundred fifty-one million, three hundred forty-nine thousand, thirty-eight".