13971530 has 8 divisors (see below), whose sum is σ = 25148772. Its totient is φ = 5588608.

The previous prime is 13971523. The next prime is 13971539. The reversal of 13971530 is 3517931.

It can be written as a sum of positive squares in 2 ways, for example, as 12411529 + 1560001 = 3523^2 + 1249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 13971493 and 13971502.

It is not an unprimeable number, because it can be changed into a prime (13971539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698567 + ... + 698586.

Almost surely, 2^13971530 is an apocalyptic number.

13971530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13971530 is a deficient number, since it is larger than the sum of its proper divisors (11177242).

13971530 is a wasteful number, since it uses less digits than its factorization.

13971530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397160.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 13971530 is about 3737.8509868640. The cubic root of 13971530 is about 240.8507423336.

The spelling of 13971530 in words is "thirteen million, nine hundred seventy-one thousand, five hundred thirty".