15401261 has 2 divisors, whose sum is σ = 15401262. Its totient is φ = 15401260.

The previous prime is 15401257. The next prime is 15401273. The reversal of 15401261 is 16210451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13645636 + 1755625 = 3694^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 15401261 - 2² = 15401257 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15401251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7700630 + 7700631.

It is an arithmetic number, because the mean of its divisors is an integer number (7700631).

Almost surely, 2^15401261 is an apocalyptic number.

It is an amenable number.

15401261 is a deficient number, since it is larger than the sum of its proper divisors (1).

15401261 is an equidigital number, since it uses as much as digits as its factorization.

15401261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 15401261 is about 3924.4440370580. Note that the first 3 decimals coincide. The cubic root of 15401261 is about 248.8009839689.

The spelling of 15401261 in words is "fifteen million, four hundred one thousand, two hundred sixty-one".