243750401 has 2 divisors, whose sum is σ = 243750402. Its totient is φ = 243750400.

The previous prime is 243750349. The next prime is 243750421. The reversal of 243750401 is 104057342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202777600 + 40972801 = 14240^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 243750401 - 2⁶ = 243750337 is a prime.

It is not a weakly prime, because it can be changed into another prime (243750421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121875200 + 121875201.

It is an arithmetic number, because the mean of its divisors is an integer number (121875201).

Almost surely, 2^243750401 is an apocalyptic number.

It is an amenable number.

243750401 is a deficient number, since it is larger than the sum of its proper divisors (1).

243750401 is an equidigital number, since it uses as much as digits as its factorization.

243750401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 243750401 is about 15612.5078382686. The cubic root of 243750401 is about 624.6668312827. Note that the first 3 decimals are identical.

The spelling of 243750401 in words is "two hundred forty-three million, seven hundred fifty thousand, four hundred one".