7250921 has 2 divisors, whose sum is σ = 7250922. Its totient is φ = 7250920.

The previous prime is 7250897. The next prime is 7250939. The reversal of 7250921 is 1290527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5953600 + 1297321 = 2440^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 7250921 - 2¹⁰ = 7249897 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (7250021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3625460 + 3625461.

It is an arithmetic number, because the mean of its divisors is an integer number (3625461).

Almost surely, 2^7250921 is an apocalyptic number.

It is an amenable number.

7250921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7250921 is an equidigital number, since it uses as much as digits as its factorization.

7250921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 7250921 is about 2692.7534235425. The cubic root of 7250921 is about 193.5520272646.

The spelling of 7250921 in words is "seven million, two hundred fifty thousand, nine hundred twenty-one".