1291672134 has 24 divisors (see below), whose sum is σ = 2920303152. Its totient is φ = 411837360.

The previous prime is 1291672103. The next prime is 1291672139. The reversal of 1291672134 is 4312761921.

It is a super-2 number, since 2×1291672134² = 3336833803504227912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291672139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1559577 + ... + 1560404.

It is an arithmetic number, because the mean of its divisors is an integer number (121679298).

Almost surely, 2^1291672134 is an apocalyptic number.

1291672134 is an abundant number, since it is smaller than the sum of its proper divisors (1628631018).

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

1291672134 is a wasteful number, since it uses less digits than its factorization.

1291672134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120012 (or 3120009 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1291672134 is about 35939.8404837862. The cubic root of 1291672134 is about 1089.0573827549.

The spelling of 1291672134 in words is "one billion, two hundred ninety-one million, six hundred seventy-two thousand, one hundred thirty-four".