12172401 has 6 divisors (see below), whose sum is σ = 17582370. Its totient is φ = 8114928.

The previous prime is 12172393. The next prime is 12172409. The reversal of 12172401 is 10427121.

12172401 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12172393) and next prime (12172409).

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 62001 = 3480^2 + 249^2 .

It is not a de Polignac number, because 12172401 - 2³ = 12172393 is a prime.

It is a super-2 number, since 2×12172401² = 296334692209602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12172409) 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, 676236 + ... + 676253.

It is an arithmetic number, because the mean of its divisors is an integer number (2930395).

Almost surely, 2^12172401 is an apocalyptic number.

It is an amenable number.

12172401 is a deficient number, since it is larger than the sum of its proper divisors (5409969).

12172401 is a wasteful number, since it uses less digits than its factorization.

12172401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352495 (or 1352492 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 12172401 is about 3488.8968170469. The cubic root of 12172401 is about 230.0340277317.

Adding to 12172401 its reverse (10427121), we get a palindrome (22599522).

The spelling of 12172401 in words is "twelve million, one hundred seventy-two thousand, four hundred one".