42409545 has 16 divisors (see below), whose sum is σ = 67966080. Its totient is φ = 22581504.

The previous prime is 42409541. The next prime is 42409553. The reversal of 42409545 is 54590424.

It is not a de Polignac number, because 42409545 - 2² = 42409541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42409541) 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, 8961 + ... + 12849.

It is an arithmetic number, because the mean of its divisors is an integer number (4247880).

Almost surely, 2^42409545 is an apocalyptic number.

It is an amenable number.

42409545 is a deficient number, since it is larger than the sum of its proper divisors (25556535).

42409545 is a wasteful number, since it uses less digits than its factorization.

42409545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4624.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 42409545 is about 6512.2611280568. The cubic root of 42409545 is about 348.7288446976.

Adding to 42409545 its reverse (54590424), we get a palindrome (96999969).

The spelling of 42409545 in words is "forty-two million, four hundred nine thousand, five hundred forty-five".