1250133161 has 4 divisors (see below), whose sum is σ = 1251494400. Its totient is φ = 1248771924.

The previous prime is 1250133151. The next prime is 1250133167. The reversal of 1250133161 is 1613310521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1613310521 = 773 ⋅2087077.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1250133161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250133167) 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, 679241 + ... + 681078.

It is an arithmetic number, because the mean of its divisors is an integer number (312873600).

Almost surely, 2^1250133161 is an apocalyptic number.

It is an amenable number.

1250133161 is a deficient number, since it is larger than the sum of its proper divisors (1361239).

1250133161 is an equidigital number, since it uses as much as digits as its factorization.

1250133161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361238.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1250133161 is about 35357.2221900986. Note that the first 3 decimals coincide. The cubic root of 1250133161 is about 1077.2555952148.

Adding to 1250133161 its reverse (1613310521), we get a palindrome (2863443682).

The spelling of 1250133161 in words is "one billion, two hundred fifty million, one hundred thirty-three thousand, one hundred sixty-one".