125120906 has 8 divisors (see below), whose sum is σ = 194153220. Its totient is φ = 60403168.

The previous prime is 125120903. The next prime is 125120953. The reversal of 125120906 is 609021521.

It can be written as a sum of positive squares in 2 ways, for example, as 115455025 + 9665881 = 10745^2 + 3109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×125120906² = 31310482236521672, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (125120903) 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, 1078571 + ... + 1078686.

Almost surely, 2^125120906 is an apocalyptic number.

125120906 is a deficient number, since it is larger than the sum of its proper divisors (69032314).

125120906 is a wasteful number, since it uses less digits than its factorization.

125120906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157288.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 125120906 is about 11185.7456613317. The cubic root of 125120906 is about 500.1611560519.

The spelling of 125120906 in words is "one hundred twenty-five million, one hundred twenty thousand, nine hundred six".