42149941 has 2 divisors, whose sum is σ = 42149942. Its totient is φ = 42149940.

The previous prime is 42149911. The next prime is 42149951. The reversal of 42149941 is 14994124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36650916 + 5499025 = 6054^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 42149941 - 2⁵ = 42149909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42149897 and 42149906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42149911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21074970 + 21074971.

It is an arithmetic number, because the mean of its divisors is an integer number (21074971).

Almost surely, 2^42149941 is an apocalyptic number.

It is an amenable number.

42149941 is a deficient number, since it is larger than the sum of its proper divisors (1).

42149941 is an equidigital number, since it uses as much as digits as its factorization.

42149941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 42149941 is about 6492.2985914081. The cubic root of 42149941 is about 348.0158231454.

The spelling of 42149941 in words is "forty-two million, one hundred forty-nine thousand, nine hundred forty-one".