125517029 has 4 divisors (see below), whose sum is σ = 136927680. Its totient is φ = 114106380.

The previous prime is 125516981. The next prime is 125517037. The reversal of 125517029 is 920715521.

It is a happy number.

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: 920715521 = 11 ⋅83701411.

It is a cyclic number.

It is not a de Polignac number, because 125517029 - 2¹⁶ = 125451493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125516986 and 125517004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125517229) 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, 5705309 + ... + 5705330.

It is an arithmetic number, because the mean of its divisors is an integer number (34231920).

Almost surely, 2^125517029 is an apocalyptic number.

It is an amenable number.

125517029 is a deficient number, since it is larger than the sum of its proper divisors (11410651).

125517029 is a wasteful number, since it uses less digits than its factorization.

125517029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11410650.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 125517029 is about 11203.4382668893. The cubic root of 125517029 is about 500.6884237106.

The spelling of 125517029 in words is "one hundred twenty-five million, five hundred seventeen thousand, twenty-nine".