1251201168 has 240 divisors, whose sum is σ = 4286836736. Its totient is φ = 345720960.

The previous prime is 1251201109. The next prime is 1251201181. The reversal of 1251201168 is 8611021521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 842955 + ... + 844437.

Almost surely, 2^1251201168 is an apocalyptic number.

1251201168 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 1251201168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143418368).

1251201168 is an abundant number, since it is smaller than the sum of its proper divisors (3035635568).

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

1251201168 is a wasteful number, since it uses less digits than its factorization.

1251201168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1526 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 1251201168 is about 35372.3220611822. The cubic root of 1251201168 is about 1077.5622796207.

Adding to 1251201168 its reverse (8611021521), we get a palindrome (9862222689).

The spelling of 1251201168 in words is "one billion, two hundred fifty-one million, two hundred one thousand, one hundred sixty-eight".