4142991 has 4 divisors (see below), whose sum is σ = 5523992. Its totient is φ = 2761992.

The previous prime is 4142989. The next prime is 4142993. The reversal of 4142991 is 1992414.

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

It is an interprime number because it is at equal distance from previous prime (4142989) and next prime (4142993).

It is not a de Polignac number, because 4142991 - 2¹ = 4142989 is a prime.

It is a super-3 number, since 3×4142991³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4142993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 690496 + ... + 690501.

It is an arithmetic number, because the mean of its divisors is an integer number (1380998).

Almost surely, 2^4142991 is an apocalyptic number.

4142991 is a deficient number, since it is larger than the sum of its proper divisors (1381001).

4142991 is a wasteful number, since it uses less digits than its factorization.

4142991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381000.

The product of its digits is 2592, while the sum is 30.

The square root of 4142991 is about 2035.4338603846. The cubic root of 4142991 is about 160.6095369349.

The spelling of 4142991 in words is "four million, one hundred forty-two thousand, nine hundred ninety-one".