129541537 has 4 divisors (see below), whose sum is σ = 129758400. Its totient is φ = 129324676.

The previous prime is 129541501. The next prime is 129541553. The reversal of 129541537 is 735145921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 735145921 = 379 ⋅1939699.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129541537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129541496 and 129541505.

It is not an unprimeable number, because it can be changed into a prime (129541567) 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, 107533 + ... + 108730.

It is an arithmetic number, because the mean of its divisors is an integer number (32439600).

Almost surely, 2^129541537 is an apocalyptic number.

It is an amenable number.

129541537 is a deficient number, since it is larger than the sum of its proper divisors (216863).

129541537 is an equidigital number, since it uses as much as digits as its factorization.

129541537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216862.

The product of its digits is 37800, while the sum is 37.

The square root of 129541537 is about 11381.6315614239. The cubic root of 129541537 is about 505.9834926682.

The spelling of 129541537 in words is "one hundred twenty-nine million, five hundred forty-one thousand, five hundred thirty-seven".