40142929 has 2 divisors, whose sum is σ = 40142930. Its totient is φ = 40142928.

The previous prime is 40142863. The next prime is 40142939. The reversal of 40142929 is 92924104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39690000 + 452929 = 6300^2 + 673^2 .

It is a cyclic number.

It is not a de Polignac number, because 40142929 - 2²³ = 31754321 is a prime.

It is a super-2 number, since 2×40142929² = 3222909497398082, which contains 22 as substring.

It is equal to p_2441839 and since 40142929 and 2441839 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40142929.

It is not a weakly prime, because it can be changed into another prime (40142939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20071464 + 20071465.

It is an arithmetic number, because the mean of its divisors is an integer number (20071465).

Almost surely, 2^40142929 is an apocalyptic number.

It is an amenable number.

40142929 is a deficient number, since it is larger than the sum of its proper divisors (1).

40142929 is an equidigital number, since it uses as much as digits as its factorization.

40142929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 40142929 is about 6335.8447739824. The cubic root of 40142929 is about 342.4020470415.

The spelling of 40142929 in words is "forty million, one hundred forty-two thousand, nine hundred twenty-nine".