4250921 has 4 divisors (see below), whose sum is σ = 4354644. Its totient is φ = 4147200.

The previous prime is 4250903. The next prime is 4250923. The reversal of 4250921 is 1290524.

4250921 = T₁₉₉ + T₂₀₀ + ... + T₃₂₁.

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 583696 + 3667225 = 764^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 4250921 - 2¹⁰ = 4249897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4250923) 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, 51800 + ... + 51881.

It is an arithmetic number, because the mean of its divisors is an integer number (1088661).

Almost surely, 2^4250921 is an apocalyptic number.

4250921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4250921 is a deficient number, since it is larger than the sum of its proper divisors (103723).

4250921 is a wasteful number, since it uses less digits than its factorization.

4250921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103722.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 4250921 is about 2061.7761760191. The cubic root of 4250921 is about 161.9922899343.

The spelling of 4250921 in words is "four million, two hundred fifty thousand, nine hundred twenty-one".