42061994 has 8 divisors (see below), whose sum is σ = 67946340. Its totient is φ = 19413216.

The previous prime is 42061979. The next prime is 42062003. The reversal of 42061994 is 49916024.

It can be written as a sum of positive squares in 2 ways, for example, as 38278969 + 3783025 = 6187^2 + 1945^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×42061994² = 3538422678512072, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 808859 + ... + 808910.

Almost surely, 2^42061994 is an apocalyptic number.

42061994 is a deficient number, since it is larger than the sum of its proper divisors (25884346).

42061994 is a wasteful number, since it uses less digits than its factorization.

42061994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617784.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 42061994 is about 6485.5218756859. The cubic root of 42061994 is about 347.7736064385.

The spelling of 42061994 in words is "forty-two million, sixty-one thousand, nine hundred ninety-four".