142501813 has 4 divisors (see below), whose sum is σ = 148697568. Its totient is φ = 136306060.

The previous prime is 142501811. The next prime is 142501817. The reversal of 142501813 is 318105241.

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: 318105241 = 17 ⋅18712073.

It is a cyclic number.

It is not a de Polignac number, because 142501813 - 2¹ = 142501811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142501811) 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 3 ways as a sum of consecutive naturals, for example, 3097843 + ... + 3097888.

It is an arithmetic number, because the mean of its divisors is an integer number (37174392).

Almost surely, 2^142501813 is an apocalyptic number.

It is an amenable number.

142501813 is a deficient number, since it is larger than the sum of its proper divisors (6195755).

142501813 is an equidigital number, since it uses as much as digits as its factorization.

142501813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6195754.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 142501813 is about 11937.4123242854. The cubic root of 142501813 is about 522.3241785356.

The spelling of 142501813 in words is "one hundred forty-two million, five hundred one thousand, eight hundred thirteen".