1278001152 has 210 divisors, whose sum is σ = 3867947748. Its totient is φ = 422019072.

The previous prime is 1278001121. The next prime is 1278001211. The reversal of 1278001152 is 2511008721.

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 13 ways as a sum of consecutive naturals, for example, 11943883 + ... + 11943989.

Almost surely, 2^1278001152 is an apocalyptic number.

1278001152 is a gapful number since it is divisible by the number (12) 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 1278001152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933973874).

1278001152 is an abundant number, since it is smaller than the sum of its proper divisors (2589946596).

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

1278001152 is an frugal number, since it uses more digits than its factorization.

1278001152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 1278001152 is about 35749.1419757174. The cubic root of 1278001152 is about 1085.2015742485.

Adding to 1278001152 its reverse (2511008721), we get a palindrome (3789009873).

The spelling of 1278001152 in words is "one billion, two hundred seventy-eight million, one thousand, one hundred fifty-two".