40002146 has 4 divisors (see below), whose sum is σ = 60003222. Its totient is φ = 20001072.

The previous prime is 40002133. The next prime is 40002191. The reversal of 40002146 is 64120004.

40002146 is nontrivially palindromic in base 16.

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

It can be written as a sum of positive squares in only one way, i.e., 31528225 + 8473921 = 5615^2 + 2911^2 .

40002146 is an undulating number in base 16.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000535 + ... + 10000538.

Almost surely, 2^40002146 is an apocalyptic number.

40002146 is a deficient number, since it is larger than the sum of its proper divisors (20001076).

40002146 is a wasteful number, since it uses less digits than its factorization.

40002146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20001075.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 40002146 is about 6324.7249742578. The cubic root of 40002146 is about 342.0013052399.

The spelling of 40002146 in words is "forty million, two thousand, one hundred forty-six".