42197445 has 12 divisors (see below), whose sum is σ = 73142316. Its totient is φ = 22505280.

The previous prime is 42197443. The next prime is 42197447. The reversal of 42197445 is 54479124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42197443) and next prime (42197447).

It can be written as a sum of positive squares in 2 ways, for example, as 7834401 + 34363044 = 2799^2 + 5862^2 .

It is not a de Polignac number, because 42197445 - 2¹ = 42197443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42197443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468816 + ... + 468905.

It is an arithmetic number, because the mean of its divisors is an integer number (6095193).

Almost surely, 2^42197445 is an apocalyptic number.

42197445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42197445 is a deficient number, since it is larger than the sum of its proper divisors (30944871).

42197445 is a wasteful number, since it uses less digits than its factorization.

42197445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937732 (or 937729 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 42197445 is about 6495.9560497282. The cubic root of 42197445 is about 348.1465148020.

It can be divided in two parts, 4219 and 7445, that added together give a square (11664 = 108²).

The spelling of 42197445 in words is "forty-two million, one hundred ninety-seven thousand, four hundred forty-five".