142113649 has 4 divisors (see below), whose sum is σ = 142907760. Its totient is φ = 141319540.

The previous prime is 142113637. The next prime is 142113689. The reversal of 142113649 is 946311241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 946311241 = 23 ⋅41143967.

It is a cyclic number.

It is not a de Polignac number, because 142113649 - 2¹¹ = 142111601 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142113649.

It is not an unprimeable number, because it can be changed into a prime (142113689) 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, 396787 + ... + 397144.

It is an arithmetic number, because the mean of its divisors is an integer number (35726940).

Almost surely, 2^142113649 is an apocalyptic number.

It is an amenable number.

142113649 is a deficient number, since it is larger than the sum of its proper divisors (794111).

142113649 is an equidigital number, since it uses as much as digits as its factorization.

142113649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794110.

The product of its digits is 5184, while the sum is 31.

The square root of 142113649 is about 11921.1429401715. The cubic root of 142113649 is about 521.8494902802.

The spelling of 142113649 in words is "one hundred forty-two million, one hundred thirteen thousand, six hundred forty-nine".