12401442 has 12 divisors (see below), whose sum is σ = 26869830. Its totient is φ = 4133808.

The previous prime is 12401437. The next prime is 12401447. The reversal of 12401442 is 24410421.

It is an interprime number because it is at equal distance from previous prime (12401437) and next prime (12401447).

It can be written as a sum of positive squares in only one way, i.e., 11553201 + 848241 = 3399^2 + 921^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 688969 = 12401442 / (1 + 2 + 4 + 0 + 1 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (12401447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 344467 + ... + 344502.

Almost surely, 2^12401442 is an apocalyptic number.

12401442 is an abundant number, since it is smaller than the sum of its proper divisors (14468388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12401442 is a wasteful number, since it uses less digits than its factorization.

12401442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688977 (or 688974 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 12401442 is about 3521.5681166208. The cubic root of 12401442 is about 231.4678772484.

Adding to 12401442 its reverse (24410421), we get a palindrome (36811863).

The spelling of 12401442 in words is "twelve million, four hundred one thousand, four hundred forty-two".