124805649 has 4 divisors (see below), whose sum is σ = 166407536. Its totient is φ = 83203764.

The previous prime is 124805641. The next prime is 124805671. The reversal of 124805649 is 946508421.

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.

It is not a de Polignac number, because 124805649 - 2³ = 124805641 is a prime.

It is a super-2 number, since 2×124805649² = 31152900044622402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124805641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20800939 + ... + 20800944.

It is an arithmetic number, because the mean of its divisors is an integer number (41601884).

Almost surely, 2^124805649 is an apocalyptic number.

It is an amenable number.

124805649 is a deficient number, since it is larger than the sum of its proper divisors (41601887).

124805649 is an equidigital number, since it uses as much as digits as its factorization.

124805649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41601886.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 124805649 is about 11171.6448654618. The cubic root of 124805649 is about 499.7407309157.

The spelling of 124805649 in words is "one hundred twenty-four million, eight hundred five thousand, six hundred forty-nine".