40154249 has 2 divisors, whose sum is σ = 40154250. Its totient is φ = 40154248.

The previous prime is 40154243. The next prime is 40154281. The reversal of 40154249 is 94245104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40094224 + 60025 = 6332^2 + 245^2 .

It is a cyclic number.

It is not a de Polignac number, because 40154249 - 2¹² = 40150153 is a prime.

It is a super-2 number, since 2×40154249² = 3224727425508002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40154243) 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, 20077124 + 20077125.

It is an arithmetic number, because the mean of its divisors is an integer number (20077125).

Almost surely, 2^40154249 is an apocalyptic number.

It is an amenable number.

40154249 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154249 is an equidigital number, since it uses as much as digits as its factorization.

40154249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 40154249 is about 6336.7380409798. The cubic root of 40154249 is about 342.4342289392.

The spelling of 40154249 in words is "forty million, one hundred fifty-four thousand, two hundred forty-nine".