1187412481 has 8 divisors (see below), whose sum is σ = 1260341640. Its totient is φ = 1114825728.

The previous prime is 1187412469. The next prime is 1187412487. The reversal of 1187412481 is 1842147811.

It can be written as a sum of positive squares in 4 ways, for example, as 367105600 + 820306881 = 19160^2 + 28641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1187412481 - 2²⁹ = 650541569 is a prime.

It is a super-2 number, since 2×1187412481² = 2819896800069150722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1187412481.

It is not an unprimeable number, because it can be changed into a prime (1187412487) 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 7 ways as a sum of consecutive naturals, for example, 78436 + ... + 92341.

It is an arithmetic number, because the mean of its divisors is an integer number (157542705).

Almost surely, 2^1187412481 is an apocalyptic number.

It is an amenable number.

1187412481 is a deficient number, since it is larger than the sum of its proper divisors (72929159).

1187412481 is a wasteful number, since it uses less digits than its factorization.

1187412481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171203.

The product of its digits is 14336, while the sum is 37.

The square root of 1187412481 is about 34458.8519977088. The cubic root of 1187412481 is about 1058.9298803338.

The spelling of 1187412481 in words is "one billion, one hundred eighty-seven million, four hundred twelve thousand, four hundred eighty-one".