200724121 has 4 divisors (see below), whose sum is σ = 216164452. Its totient is φ = 185283792.

The previous prime is 200724119. The next prime is 200724127. The reversal of 200724121 is 121427002.

It is a happy number.

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 61011721 + 139712400 = 7811^2 + 11820^2 .

It is a cyclic number.

It is not a de Polignac number, because 200724121 - 2¹ = 200724119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200724127) 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, 7720146 + ... + 7720171.

It is an arithmetic number, because the mean of its divisors is an integer number (54041113).

Almost surely, 2^200724121 is an apocalyptic number.

It is an amenable number.

200724121 is a deficient number, since it is larger than the sum of its proper divisors (15440331).

200724121 is a wasteful number, since it uses less digits than its factorization.

200724121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15440330.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 200724121 is about 14167.7140357928. The cubic root of 200724121 is about 585.5084784500.

The spelling of 200724121 in words is "two hundred million, seven hundred twenty-four thousand, one hundred twenty-one".