1197540971 has 8 divisors (see below), whose sum is σ = 1308392688. Its totient is φ = 1087020000.

The previous prime is 1197540961. The next prime is 1197541003. The reversal of 1197540971 is 1790457911.

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

It is not a de Polignac number, because 1197540971 - 2¹⁸ = 1197278827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1197540901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75080 + ... + 89621.

It is an arithmetic number, because the mean of its divisors is an integer number (163549086).

Almost surely, 2^1197540971 is an apocalyptic number.

1197540971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1197540971 is a deficient number, since it is larger than the sum of its proper divisors (110851717).

1197540971 is a wasteful number, since it uses less digits than its factorization.

1197540971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165373.

The product of its (nonzero) digits is 79380, while the sum is 44.

The square root of 1197540971 is about 34605.5049233500. The cubic root of 1197540971 is about 1061.9322094069.

The spelling of 1197540971 in words is "one billion, one hundred ninety-seven million, five hundred forty thousand, nine hundred seventy-one".