1250966161 has 9 divisors (see below), whose sum is σ = 1266179889. Its totient is φ = 1235934336.

The previous prime is 1250966141. The next prime is 1250966183. The reversal of 1250966161 is 1616690521.

The square root of 1250966161 is 35369.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1195015761 + 55950400 = 34569^2 + 7480^2 .

It is not a de Polignac number, because 1250966161 - 2¹⁵ = 1250933393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1250966161.

It is not an unprimeable number, because it can be changed into a prime (1250966141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3996541 + ... + 3996853.

Almost surely, 2^1250966161 is an apocalyptic number.

1250966161 is the 35369-th square number.

1250966161 is the 17685-th centered octagonal number.

It is an amenable number.

1250966161 is a deficient number, since it is larger than the sum of its proper divisors (15213728).

1250966161 is an frugal number, since it uses more digits than its factorization.

1250966161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 37.

The cubic root of 1250966161 is about 1077.4948109777.

The spelling of 1250966161 in words is "one billion, two hundred fifty million, nine hundred sixty-six thousand, one hundred sixty-one".