42651994 has 16 divisors (see below), whose sum is σ = 79765056. Its totient is φ = 16617600.

The previous prime is 42651971. The next prime is 42652003. The reversal of 42651994 is 49915624.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138327 + ... + 138634.

It is an arithmetic number, because the mean of its divisors is an integer number (4985316).

Almost surely, 2^42651994 is an apocalyptic number.

42651994 is a deficient number, since it is larger than the sum of its proper divisors (37113062).

42651994 is a wasteful number, since it uses less digits than its factorization.

42651994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276981.

The product of its digits is 77760, while the sum is 40.

The square root of 42651994 is about 6530.8494087676. The cubic root of 42651994 is about 349.3921258178.

The spelling of 42651994 in words is "forty-two million, six hundred fifty-one thousand, nine hundred ninety-four".