49142581 has 8 divisors (see below), whose sum is σ = 49595904. Its totient is φ = 48691680.

The previous prime is 49142573. The next prime is 49142609. The reversal of 49142581 is 18524194.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 49142581 - 2³ = 49142573 is a prime.

It is a super-2 number, since 2×49142581² = 4829986534683122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49142081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87006 + ... + 87568.

It is an arithmetic number, because the mean of its divisors is an integer number (6199488).

Almost surely, 2^49142581 is an apocalyptic number.

It is an amenable number.

49142581 is a deficient number, since it is larger than the sum of its proper divisors (453323).

49142581 is a wasteful number, since it uses less digits than its factorization.

49142581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its digits is 11520, while the sum is 34.

The square root of 49142581 is about 7010.1769592500. The cubic root of 49142581 is about 366.2851575471.

The spelling of 49142581 in words is "forty-nine million, one hundred forty-two thousand, five hundred eighty-one".