1194161251 has 4 divisors (see below), whose sum is σ = 1194287112. Its totient is φ = 1194035392.

The previous prime is 1194161249. The next prime is 1194161321. The reversal of 1194161251 is 1521614911.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1521614911 = 131 ⋅11615381.

It is a cyclic number.

It is not a de Polignac number, because 1194161251 - 2¹ = 1194161249 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1194161201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47425 + ... + 68098.

It is an arithmetic number, because the mean of its divisors is an integer number (298571778).

Almost surely, 2^1194161251 is an apocalyptic number.

1194161251 is a deficient number, since it is larger than the sum of its proper divisors (125861).

1194161251 is a wasteful number, since it uses less digits than its factorization.

1194161251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125860.

The product of its digits is 2160, while the sum is 31.

The square root of 1194161251 is about 34556.6383058306. The cubic root of 1194161251 is about 1060.9322672307.

The spelling of 1194161251 in words is "one billion, one hundred ninety-four million, one hundred sixty-one thousand, two hundred fifty-one".