133891425 has 18 divisors (see below), whose sum is σ = 239814822. Its totient is φ = 71408640.

The previous prime is 133891411. The next prime is 133891469. The reversal of 133891425 is 524198331.

It can be written as a sum of positive squares in 3 ways, for example, as 904401 + 132987024 = 951^2 + 11532^2 .

It is not a de Polignac number, because 133891425 - 2⁶ = 133891361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133891425.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 297312 + ... + 297761.

Almost surely, 2^133891425 is an apocalyptic number.

133891425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133891425 is a deficient number, since it is larger than the sum of its proper divisors (105923397).

133891425 is a wasteful number, since it uses less digits than its factorization.

133891425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595089 (or 595081 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 133891425 is about 11571.1462267141. The cubic root of 133891425 is about 511.5847475842.

The spelling of 133891425 in words is "one hundred thirty-three million, eight hundred ninety-one thousand, four hundred twenty-five".