42649207 has 4 divisors (see below), whose sum is σ = 42921016. Its totient is φ = 42377400.

The previous prime is 42649183. The next prime is 42649213. The reversal of 42649207 is 70294624.

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

It is a cyclic number.

It is not a de Polignac number, because 42649207 - 2²³ = 34260599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42649247) 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, 135669 + ... + 135982.

It is an arithmetic number, because the mean of its divisors is an integer number (10730254).

Almost surely, 2^42649207 is an apocalyptic number.

42649207 is a deficient number, since it is larger than the sum of its proper divisors (271809).

42649207 is a wasteful number, since it uses less digits than its factorization.

42649207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271808.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 42649207 is about 6530.6360333432. The cubic root of 42649207 is about 349.3845155674.

The spelling of 42649207 in words is "forty-two million, six hundred forty-nine thousand, two hundred seven".