42997544 has 8 divisors (see below), whose sum is σ = 80620410. Its totient is φ = 21498768.

The previous prime is 42997531. The next prime is 42997547. The reversal of 42997544 is 44579924.

It can be written as a sum of positive squares in only one way, i.e., 33200644 + 9796900 = 5762^2 + 3130^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 42997495 and 42997504.

It is not an unprimeable number, because it can be changed into a prime (42997547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2687339 + ... + 2687354.

Almost surely, 2^42997544 is an apocalyptic number.

It is an amenable number.

42997544 is a deficient number, since it is larger than the sum of its proper divisors (37622866).

42997544 is a wasteful number, since it uses less digits than its factorization.

42997544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374699 (or 5374695 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 42997544 is about 6557.2512533835. The cubic root of 42997544 is about 350.3331358763. Note that the first 3 decimals are identical.

The spelling of 42997544 in words is "forty-two million, nine hundred ninety-seven thousand, five hundred forty-four".