124540221 has 8 divisors (see below), whose sum is σ = 178827040. Its totient is φ = 76640112.

The previous prime is 124540217. The next prime is 124540253. The reversal of 124540221 is 122045421.

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

It is not a de Polignac number, because 124540221 - 2² = 124540217 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 (124540211) 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, 1596631 + ... + 1596708.

It is an arithmetic number, because the mean of its divisors is an integer number (22353380).

Almost surely, 2^124540221 is an apocalyptic number.

It is an amenable number.

124540221 is a deficient number, since it is larger than the sum of its proper divisors (54286819).

124540221 is a wasteful number, since it uses less digits than its factorization.

124540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193355.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 124540221 is about 11159.7590027742. The cubic root of 124540221 is about 499.3862081608.

Adding to 124540221 its reverse (122045421), we get a palindrome (246585642).

The spelling of 124540221 in words is "one hundred twenty-four million, five hundred forty thousand, two hundred twenty-one".