42440149 has 2 divisors, whose sum is σ = 42440150. Its totient is φ = 42440148.

The previous prime is 42440113. The next prime is 42440161. The reversal of 42440149 is 94104424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38217124 + 4223025 = 6182^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 42440149 - 2¹³ = 42431957 is a prime.

It is equal to p_2572741 and since 42440149 and 2572741 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220074 + 21220075.

It is an arithmetic number, because the mean of its divisors is an integer number (21220075).

Almost surely, 2^42440149 is an apocalyptic number.

It is an amenable number.

42440149 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440149 is an equidigital number, since it uses as much as digits as its factorization.

42440149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 42440149 is about 6514.6104258044. The cubic root of 42440149 is about 348.8127089267.

The spelling of 42440149 in words is "forty-two million, four hundred forty thousand, one hundred forty-nine".