1188249841 has 3 divisors (see below), whose sum is σ = 1188284313. Its totient is φ = 1188215370.

The previous prime is 1188249787. The next prime is 1188249847. The reversal of 1188249841 is 1489428811.

The square root of 1188249841 is 34471.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1489428811 = 13 ⋅114571447.

It is a de Polignac number, because none of the positive numbers 2^k-1188249841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1188249791 and 1188249800.

It is not an unprimeable number, because it can be changed into a prime (1188249847) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17236 + ... + 51706.

It is an arithmetic number, because the mean of its divisors is an integer number (396094771).

Almost surely, 2^1188249841 is an apocalyptic number.

1188249841 is the 34471-st square number.

1188249841 is the 17236-th centered octagonal number.

It is an amenable number.

1188249841 is a deficient number, since it is larger than the sum of its proper divisors (34472).

1188249841 is an frugal number, since it uses more digits than its factorization.

1188249841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68942 (or 34471 counting only the distinct ones).

The product of its digits is 147456, while the sum is 46.

The cubic root of 1188249841 is about 1059.1787399862.

Multiplying 1188249841 by its product of digits (147456), we get a square (175214568554496 = 13236864²).

The spelling of 1188249841 in words is "one billion, one hundred eighty-eight million, two hundred forty-nine thousand, eight hundred forty-one".