1161128601 has 32 divisors (see below), whose sum is σ = 1749447040. Its totient is φ = 770523840.

The previous prime is 1161128599. The next prime is 1161128603. The reversal of 1161128601 is 1068211611.

It is an interprime number because it is at equal distance from previous prime (1161128599) and next prime (1161128603).

It is not a de Polignac number, because 1161128601 - 2¹ = 1161128599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161128603) 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, 525966 + ... + 528168.

It is an arithmetic number, because the mean of its divisors is an integer number (54670220).

Almost surely, 2^1161128601 is an apocalyptic number.

It is an amenable number.

1161128601 is a deficient number, since it is larger than the sum of its proper divisors (588318439).

1161128601 is an frugal number, since it uses more digits than its factorization.

1161128601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2465 (or 2447 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1161128601 is about 34075.3371369969. The cubic root of 1161128601 is about 1051.0582229274.

The spelling of 1161128601 in words is "one billion, one hundred sixty-one million, one hundred twenty-eight thousand, six hundred one".