3642139 has 4 divisors (see below), whose sum is σ = 3767760. Its totient is φ = 3516520.

The previous prime is 3642101. The next prime is 3642157. The reversal of 3642139 is 9312463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9312463 = 277 ⋅33619.

It is a cyclic number.

It is not a de Polignac number, because 3642139 - 2²¹ = 1544987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3642239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62767 + ... + 62824.

It is an arithmetic number, because the mean of its divisors is an integer number (941940).

Almost surely, 2^3642139 is an apocalyptic number.

3642139 is a deficient number, since it is larger than the sum of its proper divisors (125621).

3642139 is a wasteful number, since it uses less digits than its factorization.

3642139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125620.

The product of its digits is 3888, while the sum is 28.

The square root of 3642139 is about 1908.4388908215. The cubic root of 3642139 is about 153.8575593019.

The spelling of 3642139 in words is "three million, six hundred forty-two thousand, one hundred thirty-nine".