42436431 has 6 divisors (see below), whose sum is σ = 61297080. Its totient is φ = 28290948.

The previous prime is 42436423. The next prime is 42436439. The reversal of 42436431 is 13463424.

It is an interprime number because it is at equal distance from previous prime (42436423) and next prime (42436439).

It is not a de Polignac number, because 42436431 - 2³ = 42436423 is a prime.

It is a super-2 number, since 2×42436431² = 3601701352035522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42436395 and 42436404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42436439) 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, 2357571 + ... + 2357588.

It is an arithmetic number, because the mean of its divisors is an integer number (10216180).

Almost surely, 2^42436431 is an apocalyptic number.

42436431 is a deficient number, since it is larger than the sum of its proper divisors (18860649).

42436431 is a wasteful number, since it uses less digits than its factorization.

42436431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715165 (or 4715162 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 42436431 is about 6514.3250609714. The cubic root of 42436431 is about 348.8025226326.

Adding to 42436431 its reverse (13463424), we get a palindrome (55899855).

The spelling of 42436431 in words is "forty-two million, four hundred thirty-six thousand, four hundred thirty-one".