1170129981 has 8 divisors (see below), whose sum is σ = 1568890080. Its totient is φ = 775728272.

The previous prime is 1170129979. The next prime is 1170130021. The reversal of 1170129981 is 1899210711.

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

It is a cyclic number.

It is not a de Polignac number, because 1170129981 - 2¹ = 1170129979 is a prime.

It is a super-2 number, since 2×1170129981² = 2738408344870120722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170129901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1088970 + ... + 1090043.

It is an arithmetic number, because the mean of its divisors is an integer number (196111260).

Almost surely, 2^1170129981 is an apocalyptic number.

It is an amenable number.

1170129981 is a deficient number, since it is larger than the sum of its proper divisors (398760099).

1170129981 is a wasteful number, since it uses less digits than its factorization.

1170129981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179195.

The product of its (nonzero) digits is 9072, while the sum is 39.

The square root of 1170129981 is about 34207.1627148467. The cubic root of 1170129981 is about 1053.7672628527.

The spelling of 1170129981 in words is "one billion, one hundred seventy million, one hundred twenty-nine thousand, nine hundred eighty-one".