1250438161 has 8 divisors (see below), whose sum is σ = 1434386880. Its totient is φ = 1067818128.

The previous prime is 1250438159. The next prime is 1250438177. The reversal of 1250438161 is 1618340521.

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

It is a cyclic number.

It is not a de Polignac number, because 1250438161 - 2¹ = 1250438159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250438261) 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, 330151 + ... + 333916.

It is an arithmetic number, because the mean of its divisors is an integer number (179298360).

Almost surely, 2^1250438161 is an apocalyptic number.

It is an amenable number.

1250438161 is a deficient number, since it is larger than the sum of its proper divisors (183948719).

1250438161 is an equidigital number, since it uses as much as digits as its factorization.

1250438161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664343.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1250438161 is about 35361.5350486938. The cubic root of 1250438161 is about 1077.3431955468.

Adding to 1250438161 its reverse (1618340521), we get a palindrome (2868778682).

The spelling of 1250438161 in words is "one billion, two hundred fifty million, four hundred thirty-eight thousand, one hundred sixty-one".