42540245 has 32 divisors (see below), whose sum is σ = 58320000. Its totient is φ = 29505280.

The previous prime is 42540227. The next prime is 42540263. The reversal of 42540245 is 54204524.

It is an interprime number because it is at equal distance from previous prime (42540227) and next prime (42540263).

It is not a de Polignac number, because 42540245 - 2⁸ = 42539989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237566 + ... + 237744.

It is an arithmetic number, because the mean of its divisors is an integer number (1822500).

Almost surely, 2^42540245 is an apocalyptic number.

It is an amenable number.

42540245 is a deficient number, since it is larger than the sum of its proper divisors (15779755).

42540245 is a wasteful number, since it uses less digits than its factorization.

42540245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 42540245 is about 6522.2883254269. The cubic root of 42540245 is about 349.0867210322.

Adding to 42540245 its reverse (54204524), we get a palindrome (96744769).

The spelling of 42540245 in words is "forty-two million, five hundred forty thousand, two hundred forty-five".