13421956 has 6 divisors (see below), whose sum is σ = 23488430. Its totient is φ = 6710976.

The previous prime is 13421951. The next prime is 13421981. The reversal of 13421956 is 65912431.

It can be written as a sum of positive squares in only one way, i.e., 12716356 + 705600 = 3566^2 + 840^2 .

It is not an unprimeable number, because it can be changed into a prime (13421951) 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, 1677741 + ... + 1677748.

Almost surely, 2^13421956 is an apocalyptic number.

It is an amenable number.

13421956 is a deficient number, since it is larger than the sum of its proper divisors (10066474).

13421956 is a wasteful number, since it uses less digits than its factorization.

13421956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3355493 (or 3355491 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 13421956 is about 3663.5987771589. The cubic root of 13421956 is about 237.6504295381.

The spelling of 13421956 in words is "thirteen million, four hundred twenty-one thousand, nine hundred fifty-six".