42980781 has 8 divisors (see below), whose sum is σ = 57558880. Its totient is φ = 28528272.

The previous prime is 42980761. The next prime is 42980801. The reversal of 42980781 is 18708924.

It is an interprime number because it is at equal distance from previous prime (42980761) and next prime (42980801).

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

It is not a de Polignac number, because 42980781 - 2⁷ = 42980653 is a prime.

It is a super-2 number, since 2×42980781² = 3694695070739922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42980731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30595 + ... + 31968.

It is an arithmetic number, because the mean of its divisors is an integer number (7194860).

Almost surely, 2^42980781 is an apocalyptic number.

It is an amenable number.

42980781 is a deficient number, since it is larger than the sum of its proper divisors (14578099).

42980781 is a wasteful number, since it uses less digits than its factorization.

42980781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62795.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 42980781 is about 6555.9729255085. The cubic root of 42980781 is about 350.2876030610.

The spelling of 42980781 in words is "forty-two million, nine hundred eighty thousand, seven hundred eighty-one".