1264124161 has 4 divisors (see below), whose sum is σ = 1264872532. Its totient is φ = 1263375792.

The previous prime is 1264124159. The next prime is 1264124171. The reversal of 1264124161 is 1614214621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1614214621 = 31139 ⋅51839.

It can be written as a sum of positive squares in 2 ways, for example, as 511664400 + 752459761 = 22620^2 + 27431^2 .

It is a cyclic number.

It is not a de Polignac number, because 1264124161 - 2¹ = 1264124159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264124171) 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, 371646 + ... + 375031.

It is an arithmetic number, because the mean of its divisors is an integer number (316218133).

Almost surely, 2^1264124161 is an apocalyptic number.

It is an amenable number.

1264124161 is a deficient number, since it is larger than the sum of its proper divisors (748371).

1264124161 is an equidigital number, since it uses as much as digits as its factorization.

1264124161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748370.

The product of its digits is 2304, while the sum is 28.

The square root of 1264124161 is about 35554.5237768698. The cubic root of 1264124161 is about 1081.2594363795.

Adding to 1264124161 its reverse (1614214621), we get a palindrome (2878338782).

The spelling of 1264124161 in words is "one billion, two hundred sixty-four million, one hundred twenty-four thousand, one hundred sixty-one".