1251749046 has 16 divisors (see below), whose sum is σ = 2518858944. Its totient is φ = 414689544.

The previous prime is 1251749041. The next prime is 1251749053. The reversal of 1251749046 is 6409471521.

It is a super-3 number, since 3×1251749046³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1251748995 and 1251749013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251749041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638976 + ... + 640931.

It is an arithmetic number, because the mean of its divisors is an integer number (157428684).

Almost surely, 2^1251749046 is an apocalyptic number.

1251749046 is an abundant number, since it is smaller than the sum of its proper divisors (1267109898).

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

1251749046 is a wasteful number, since it uses less digits than its factorization.

1251749046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280075.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 1251749046 is about 35380.0656585032. The cubic root of 1251749046 is about 1077.7195382432.

The spelling of 1251749046 in words is "one billion, two hundred fifty-one million, seven hundred forty-nine thousand, forty-six".