40154129 has 4 divisors (see below), whose sum is σ = 41133540. Its totient is φ = 39174720.

The previous prime is 40154123. The next prime is 40154137. The reversal of 40154129 is 92145104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2356225 + 37797904 = 1535^2 + 6148^2 .

It is a cyclic number.

It is not a de Polignac number, because 40154129 - 2¹⁶ = 40088593 is a prime.

It is a super-2 number, since 2×40154129² = 3224708151497282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40154098 and 40154107.

It is not an unprimeable number, because it can be changed into a prime (40154123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489644 + ... + 489725.

It is an arithmetic number, because the mean of its divisors is an integer number (10283385).

Almost surely, 2^40154129 is an apocalyptic number.

It is an amenable number.

40154129 is a deficient number, since it is larger than the sum of its proper divisors (979411).

40154129 is an equidigital number, since it uses as much as digits as its factorization.

40154129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979410.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 40154129 is about 6336.7285723787. The cubic root of 40154129 is about 342.4338878200.

The spelling of 40154129 in words is "forty million, one hundred fifty-four thousand, one hundred twenty-nine".