42949642 has 4 divisors (see below), whose sum is σ = 64424466. Its totient is φ = 21474820.

The previous prime is 42949619. The next prime is 42949657. The reversal of 42949642 is 24694924.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40056241 + 2893401 = 6329^2 + 1701^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42949595 and 42949604.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10737409 + ... + 10737412.

Almost surely, 2^42949642 is an apocalyptic number.

42949642 is a deficient number, since it is larger than the sum of its proper divisors (21474824).

42949642 is a wasteful number, since it uses less digits than its factorization.

42949642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21474823.

The product of its digits is 124416, while the sum is 40.

The square root of 42949642 is about 6553.5976379390. The cubic root of 42949642 is about 350.2029897321.

The spelling of 42949642 in words is "forty-two million, nine hundred forty-nine thousand, six hundred forty-two".