124545221 has 4 divisors (see below), whose sum is σ = 125778444. Its totient is φ = 123312000.

The previous prime is 124545181. The next prime is 124545241. The reversal of 124545221 is 122545421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95277121 + 29268100 = 9761^2 + 5410^2 .

It is a cyclic number.

It is not a de Polignac number, because 124545221 - 2¹⁸ = 124283077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124545241) 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, 616460 + ... + 616661.

It is an arithmetic number, because the mean of its divisors is an integer number (31444611).

Almost surely, 2^124545221 is an apocalyptic number.

It is an amenable number.

124545221 is a deficient number, since it is larger than the sum of its proper divisors (1233223).

124545221 is a wasteful number, since it uses less digits than its factorization.

124545221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233222.

The product of its digits is 3200, while the sum is 26.

The square root of 124545221 is about 11159.9830197003. The cubic root of 124545221 is about 499.3928911360.

The spelling of 124545221 in words is "one hundred twenty-four million, five hundred forty-five thousand, two hundred twenty-one".