15630401 has 2 divisors, whose sum is σ = 15630402. Its totient is φ = 15630400.

The previous prime is 15630383. The next prime is 15630421. The reversal of 15630401 is 10403651.

It is an a-pointer prime, because the next prime (15630421) can be obtained adding 15630401 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7924225 + 7706176 = 2815^2 + 2776^2 .

It is a cyclic number.

It is not a de Polignac number, because 15630401 - 2⁶ = 15630337 is a prime.

It is a super-3 number, since 3×15630401³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15630421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7815200 + 7815201.

It is an arithmetic number, because the mean of its divisors is an integer number (7815201).

Almost surely, 2^15630401 is an apocalyptic number.

It is an amenable number.

15630401 is a deficient number, since it is larger than the sum of its proper divisors (1).

15630401 is an equidigital number, since it uses as much as digits as its factorization.

15630401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 15630401 is about 3953.5301946488. The cubic root of 15630401 is about 250.0288020150.

The spelling of 15630401 in words is "fifteen million, six hundred thirty thousand, four hundred one".