1161222501 has 8 divisors (see below), whose sum is σ = 1567895680. Its totient is φ = 764348832.

The previous prime is 1161222499. The next prime is 1161222523. The reversal of 1161222501 is 1052221611.

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

It is not a de Polignac number, because 1161222501 - 2¹ = 1161222499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161229501) 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, 2449600 + ... + 2450073.

It is an arithmetic number, because the mean of its divisors is an integer number (195986960).

Almost surely, 2^1161222501 is an apocalyptic number.

It is an amenable number.

1161222501 is a deficient number, since it is larger than the sum of its proper divisors (406673179).

1161222501 is an equidigital number, since it uses as much as digits as its factorization.

1161222501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899755.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1161222501 is about 34076.7149385031. The cubic root of 1161222501 is about 1051.0865550480.

The spelling of 1161222501 in words is "one billion, one hundred sixty-one million, two hundred twenty-two thousand, five hundred one".