1186997145 has 16 divisors (see below), whose sum is σ = 1899676800. Its totient is φ = 632904704.

The previous prime is 1186997129. The next prime is 1186997177. The reversal of 1186997145 is 5417996811.

It is a cyclic number.

It is not a de Polignac number, because 1186997145 - 2⁴ = 1186997129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73657 + ... + 88313.

It is an arithmetic number, because the mean of its divisors is an integer number (118729800).

Almost surely, 2^1186997145 is an apocalyptic number.

1186997145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1186997145 is a deficient number, since it is larger than the sum of its proper divisors (712679655).

1186997145 is a wasteful number, since it uses less digits than its factorization.

1186997145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20064.

The product of its digits is 544320, while the sum is 51.

The square root of 1186997145 is about 34452.8249204619. The cubic root of 1186997145 is about 1058.8064009203.

The spelling of 1186997145 in words is "one billion, one hundred eighty-six million, nine hundred ninety-seven thousand, one hundred forty-five".