13951421 has 6 divisors (see below), whose sum is σ = 15335166. Its totient is φ = 12683000.

The previous prime is 13951417. The next prime is 13951423. The reversal of 13951421 is 12415931.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 1092025 = 3586^2 + 1045^2 .

It is not a de Polignac number, because 13951421 - 2² = 13951417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13951423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57530 + ... + 57771.

It is an arithmetic number, because the mean of its divisors is an integer number (2555861).

Almost surely, 2^13951421 is an apocalyptic number.

13951421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13951421 is a deficient number, since it is larger than the sum of its proper divisors (1383745).

13951421 is a wasteful number, since it uses less digits than its factorization.

13951421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115323 (or 115312 counting only the distinct ones).

The product of its digits is 1080, while the sum is 26.

The square root of 13951421 is about 3735.1601036636. The cubic root of 13951421 is about 240.7351359768.

The spelling of 13951421 in words is "thirteen million, nine hundred fifty-one thousand, four hundred twenty-one".