124999945 has 8 divisors (see below), whose sum is σ = 171428544. Its totient is φ = 85714224.

The previous prime is 124999943. The next prime is 124999961. The reversal of 124999945 is 549999421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 124999945 - 2¹ = 124999943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124999892 and 124999901.

It is not an unprimeable number, because it can be changed into a prime (124999943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1785679 + ... + 1785748.

It is an arithmetic number, because the mean of its divisors is an integer number (21428568).

Almost surely, 2^124999945 is an apocalyptic number.

It is an amenable number.

124999945 is a deficient number, since it is larger than the sum of its proper divisors (46428599).

124999945 is an equidigital number, since it uses as much as digits as its factorization.

124999945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571439.

The product of its digits is 1049760, while the sum is 52.

The square root of 124999945 is about 11180.3374278239. The cubic root of 124999945 is about 499.9999266667. Note that the first 4 decimals are identical.

The spelling of 124999945 in words is "one hundred twenty-four million, nine hundred ninety-nine thousand, nine hundred forty-five".