406250561 has 2 divisors, whose sum is σ = 406250562. Its totient is φ = 406250560.

The previous prime is 406250549. The next prime is 406250573. The reversal of 406250561 is 165052604.

It is a balanced prime because it is at equal distance from previous prime (406250549) and next prime (406250573).

It can be written as a sum of positive squares in only one way, i.e., 291760561 + 114490000 = 17081^2 + 10700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406250561 is a prime.

It is not a weakly prime, because it can be changed into another prime (406250501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203125280 + 203125281.

It is an arithmetic number, because the mean of its divisors is an integer number (203125281).

Almost surely, 2^406250561 is an apocalyptic number.

It is an amenable number.

406250561 is a deficient number, since it is larger than the sum of its proper divisors (1).

406250561 is an equidigital number, since it uses as much as digits as its factorization.

406250561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 406250561 is about 20155.6582874388. The cubic root of 406250561 is about 740.6243580166.

The spelling of 406250561 in words is "four hundred six million, two hundred fifty thousand, five hundred sixty-one".