1191606241 has 32 divisors (see below), whose sum is σ = 1473970176. Its totient is φ = 940896000.

The previous prime is 1191606233. The next prime is 1191606263. The reversal of 1191606241 is 1426061911.

It is a 5-Lehmer number, since φ(1191606241) divides (1191606241-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 1191606241 - 2³ = 1191606233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a deceptive number, since it divides R_1191606240.

It is not an unprimeable number, because it can be changed into a prime (1191606541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1352121 + ... + 1353001.

It is an arithmetic number, because the mean of its divisors is an integer number (46061568).

Almost surely, 2^1191606241 is an apocalyptic number.

It is an amenable number.

1191606241 is a deficient number, since it is larger than the sum of its proper divisors (282363935).

1191606241 is a wasteful number, since it uses less digits than its factorization.

1191606241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1191606241 is about 34519.6500706482. The cubic root of 1191606241 is about 1060.1750752116.

The spelling of 1191606241 in words is "one billion, one hundred ninety-one million, six hundred six thousand, two hundred forty-one".