1161246251 has 32 divisors (see below), whose sum is σ = 1371686400. Its totient is φ = 971353600.

The previous prime is 1161246223. The next prime is 1161246253. The reversal of 1161246251 is 1526421611.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161246251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161246253) 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, 1977980 + ... + 1978566.

It is an arithmetic number, because the mean of its divisors is an integer number (42865200).

Almost surely, 2^1161246251 is an apocalyptic number.

1161246251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161246251 is a deficient number, since it is larger than the sum of its proper divisors (210440149).

1161246251 is a wasteful number, since it uses less digits than its factorization.

1161246251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835.

The product of its digits is 2880, while the sum is 29.

The square root of 1161246251 is about 34077.0634151477. The cubic root of 1161246251 is about 1051.0937208110.

Adding to 1161246251 its reverse (1526421611), we get a palindrome (2687667862).

The spelling of 1161246251 in words is "one billion, one hundred sixty-one million, two hundred forty-six thousand, two hundred fifty-one".