1187742801 has 64 divisors (see below), whose sum is σ = 1971200000. Its totient is φ = 634023936.

The previous prime is 1187742779. The next prime is 1187742811. The reversal of 1187742801 is 1082477811.

It is not a de Polignac number, because 1187742801 - 2¹³ = 1187734609 is a prime.

It is a super-2 number, since 2×1187742801² = 2821465922654651202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1187742801.

It is not an unprimeable number, because it can be changed into a prime (1187742811) 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 63 ways as a sum of consecutive naturals, for example, 1544145 + ... + 1544913.

It is an arithmetic number, because the mean of its divisors is an integer number (30800000).

Almost surely, 2^1187742801 is an apocalyptic number.

It is an amenable number.

1187742801 is a deficient number, since it is larger than the sum of its proper divisors (783457199).

1187742801 is an equidigital number, since it uses as much as digits as its factorization.

1187742801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1187742801 is about 34463.6446273461. The cubic root of 1187742801 is about 1059.0280639315.

The spelling of 1187742801 in words is "one billion, one hundred eighty-seven million, seven hundred forty-two thousand, eight hundred one".