13970521 has 8 divisors (see below), whose sum is σ = 14244704. Its totient is φ = 13698720.

The previous prime is 13970519. The next prime is 13970531. The reversal of 13970521 is 12507931.

13970521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13970521 - 2¹ = 13970519 is a prime.

It is a super-2 number, since 2×13970521² = 390350914022882, which contains 22 as substring.

It is a deceptive number, since it divides R_13970520.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13970521.

It is not an unprimeable number, because it can be changed into a prime (13970501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14950 + ... + 15856.

It is an arithmetic number, because the mean of its divisors is an integer number (1780588).

Almost surely, 2^13970521 is an apocalyptic number.

It is an amenable number.

13970521 is a deficient number, since it is larger than the sum of its proper divisors (274183).

13970521 is an equidigital number, since it uses as much as digits as its factorization.

13970521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 13970521 is about 3737.7160138245. The cubic root of 13970521 is about 240.8449442512.

The spelling of 13970521 in words is "thirteen million, nine hundred seventy thousand, five hundred twenty-one".