42551456 has 12 divisors (see below), whose sum is σ = 83773242. Its totient is φ = 21275712.

The previous prime is 42551447. The next prime is 42551461. The reversal of 42551456 is 65415524.

It can be written as a sum of positive squares in only one way, i.e., 21939856 + 20611600 = 4684^2 + 4540^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 1329733 = 42551456 / (4 + 2 + 5 + 5 + 1 + 4 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664835 + ... + 664898.

Almost surely, 2^42551456 is an apocalyptic number.

It is an amenable number.

42551456 is a deficient number, since it is larger than the sum of its proper divisors (41221786).

42551456 is a wasteful number, since it uses less digits than its factorization.

42551456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329743 (or 1329735 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

The square root of 42551456 is about 6523.1477064374. The cubic root of 42551456 is about 349.1173842899.

The spelling of 42551456 in words is "forty-two million, five hundred fifty-one thousand, four hundred fifty-six".