1198591461 has 12 divisors (see below), whose sum is σ = 1749148492. Its totient is φ = 790822656.

The previous prime is 1198591447. The next prime is 1198591529. The reversal of 1198591461 is 1641958911.

1198591461 is a `hidden beast` number, since 1 + 19 + 8 + 591 + 46 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 196868961 + 1001722500 = 14031^2 + 31650^2 .

It is not a de Polignac number, because 1198591461 - 2¹⁸ = 1198329317 is a prime.

It is a super-2 number, since 2×1198591461² = 2873242980764229042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198591561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 685606 + ... + 687351.

Almost surely, 2^1198591461 is an apocalyptic number.

It is an amenable number.

1198591461 is a deficient number, since it is larger than the sum of its proper divisors (550557031).

1198591461 is a wasteful number, since it uses less digits than its factorization.

1198591461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373060 (or 1373057 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1198591461 is about 34620.6796727043. The cubic root of 1198591461 is about 1062.2426297220.

The spelling of 1198591461 in words is "one billion, one hundred ninety-eight million, five hundred ninety-one thousand, four hundred sixty-one".