250642121 has 4 divisors (see below), whose sum is σ = 252941700. Its totient is φ = 248342544.

The previous prime is 250642111. The next prime is 250642123. The reversal of 250642121 is 121246052.

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 88360000 + 162282121 = 9400^2 + 12739^2 .

It is a cyclic number.

It is not a de Polignac number, because 250642121 - 2¹⁸ = 250379977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (250642123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1149626 + ... + 1149843.

It is an arithmetic number, because the mean of its divisors is an integer number (63235425).

Almost surely, 2^250642121 is an apocalyptic number.

It is an amenable number.

250642121 is a deficient number, since it is larger than the sum of its proper divisors (2299579).

250642121 is a wasteful number, since it uses less digits than its factorization.

250642121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299578.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 250642121 is about 15831.6809278105. The cubic root of 250642121 is about 630.4994116794.

Adding to 250642121 its reverse (121246052), we get a palindrome (371888173).

The spelling of 250642121 in words is "two hundred fifty million, six hundred forty-two thousand, one hundred twenty-one".