1297166148 has 18 divisors (see below), whose sum is σ = 3278947854. Its totient is φ = 432388704.

The previous prime is 1297166141. The next prime is 1297166197. The reversal of 1297166148 is 8416617921.

1297166148 is a `hidden beast` number, since 1 + 29 + 7 + 1 + 6 + 614 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1029254724 + 267911424 = 32082^2 + 16368^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (1297166141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18016161 + ... + 18016232.

Almost surely, 2^1297166148 is an apocalyptic number.

1297166148 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1297166148 is an abundant number, since it is smaller than the sum of its proper divisors (1981781706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297166148 is a wasteful number, since it uses less digits than its factorization.

1297166148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36032403 (or 36032398 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 1297166148 is about 36016.1928582131. The cubic root of 1297166148 is about 1090.5992687071.

The spelling of 1297166148 in words is "one billion, two hundred ninety-seven million, one hundred sixty-six thousand, one hundred forty-eight".