42149131 has 2 divisors, whose sum is σ = 42149132. Its totient is φ = 42149130.

The previous prime is 42149117. The next prime is 42149161. The reversal of 42149131 is 13194124.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42149131 - 2⁵ = 42149099 is a prime.

It is a super-2 number, since 2×42149131² = 3553098488110322, which contains 22 as substring.

It is equal to p_2556124 and since 42149131 and 2556124 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 42149096 and 42149105.

It is not a weakly prime, because it can be changed into another prime (42149111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21074565 + 21074566.

It is an arithmetic number, because the mean of its divisors is an integer number (21074566).

Almost surely, 2^42149131 is an apocalyptic number.

42149131 is a deficient number, since it is larger than the sum of its proper divisors (1).

42149131 is an equidigital number, since it uses as much as digits as its factorization.

42149131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

The square root of 42149131 is about 6492.2362095044. The cubic root of 42149131 is about 348.0135938452.

The spelling of 42149131 in words is "forty-two million, one hundred forty-nine thousand, one hundred thirty-one".