13870522 has 4 divisors (see below), whose sum is σ = 20805786. Its totient is φ = 6935260.

The previous prime is 13870501. The next prime is 13870529. The reversal of 13870522 is 22507831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22507831 = 4373 ⋅5147.

It can be written as a sum of positive squares in only one way, i.e., 10634121 + 3236401 = 3261^2 + 1799^2 .

It is not an unprimeable number, because it can be changed into a prime (13870529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3467629 + ... + 3467632.

Almost surely, 2^13870522 is an apocalyptic number.

13870522 is a deficient number, since it is larger than the sum of its proper divisors (6935264).

13870522 is an equidigital number, since it uses as much as digits as its factorization.

13870522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935263.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13870522 is about 3724.3149705684. The cubic root of 13870522 is about 240.2689230927.

The spelling of 13870522 in words is "thirteen million, eight hundred seventy thousand, five hundred twenty-two".