40015249 has 2 divisors, whose sum is σ = 40015250. Its totient is φ = 40015248.

The previous prime is 40015247. The next prime is 40015259. The reversal of 40015249 is 94251004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38526849 + 1488400 = 6207^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 40015249 - 2¹ = 40015247 is a prime.

Together with 40015247, it forms a pair of twin primes.

It is equal to p_2434534 and since 40015249 and 2434534 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40015247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20007624 + 20007625.

It is an arithmetic number, because the mean of its divisors is an integer number (20007625).

Almost surely, 2^40015249 is an apocalyptic number.

It is an amenable number.

40015249 is a deficient number, since it is larger than the sum of its proper divisors (1).

40015249 is an equidigital number, since it uses as much as digits as its factorization.

40015249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 40015249 is about 6325.7607447642. The cubic root of 40015249 is about 342.0386428526.

The spelling of 40015249 in words is "forty million, fifteen thousand, two hundred forty-nine".