42473409 has 16 divisors (see below), whose sum is σ = 61931520. Its totient is φ = 25678160.

The previous prime is 42473401. The next prime is 42473419. The reversal of 42473409 is 90437424.

It is a cyclic number.

It is not a de Polignac number, because 42473409 - 2³ = 42473401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 42473409.

It is not an unprimeable number, because it can be changed into a prime (42473401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14464 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (3870720).

Almost surely, 2^42473409 is an apocalyptic number.

It is an amenable number.

42473409 is a deficient number, since it is larger than the sum of its proper divisors (19458111).

42473409 is a wasteful number, since it uses less digits than its factorization.

42473409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 42473409 is about 6517.1626494971. The cubic root of 42473409 is about 348.9038056957.

The spelling of 42473409 in words is "forty-two million, four hundred seventy-three thousand, four hundred nine".