40154461 has 2 divisors, whose sum is σ = 40154462. Its totient is φ = 40154460.

The previous prime is 40154441. The next prime is 40154537. The reversal of 40154461 is 16445104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40081561 + 72900 = 6331^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 40154461 - 2⁷ = 40154333 is a prime.

It is a super-2 number, since 2×40154461² = 3224761476401042, which contains 22 as substring.

It is equal to p_2442490 and since 40154461 and 2442490 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 (40154431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077230 + 20077231.

It is an arithmetic number, because the mean of its divisors is an integer number (20077231).

Almost surely, 2^40154461 is an apocalyptic number.

It is an amenable number.

40154461 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154461 is an equidigital number, since it uses as much as digits as its factorization.

40154461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 40154461 is about 6336.7547688071. The cubic root of 40154461 is about 342.4348315813.

Adding to 40154461 its reverse (16445104), we get a palindrome (56599565).

The spelling of 40154461 in words is "forty million, one hundred fifty-four thousand, four hundred sixty-one".