1251054993 has 8 divisors (see below), whose sum is σ = 1674010656. Its totient is φ = 831068000.

The previous prime is 1251054991. The next prime is 1251055027. The reversal of 1251054993 is 3994501521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1251054993 - 2¹ = 1251054991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1251054991) 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 7 ways as a sum of consecutive naturals, for example, 741183 + ... + 742868.

It is an arithmetic number, because the mean of its divisors is an integer number (209251332).

Almost surely, 2^1251054993 is an apocalyptic number.

It is an amenable number.

1251054993 is a deficient number, since it is larger than the sum of its proper divisors (422955663).

1251054993 is a wasteful number, since it uses less digits than its factorization.

1251054993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484335.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 1251054993 is about 35370.2557666749. The cubic root of 1251054993 is about 1077.5203149325.

The spelling of 1251054993 in words is "one billion, two hundred fifty-one million, fifty-four thousand, nine hundred ninety-three".