142961813 has 8 divisors (see below), whose sum is σ = 151222848. Its totient is φ = 134871264.

The previous prime is 142961809. The next prime is 142961839. The reversal of 142961813 is 318169241.

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

It is not a de Polignac number, because 142961813 - 2² = 142961809 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 (142961873) 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, 40895 + ... + 44252.

It is an arithmetic number, because the mean of its divisors is an integer number (18902856).

Almost surely, 2^142961813 is an apocalyptic number.

It is an amenable number.

142961813 is a deficient number, since it is larger than the sum of its proper divisors (8261035).

142961813 is an equidigital number, since it uses as much as digits as its factorization.

142961813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85243.

The product of its digits is 10368, while the sum is 35.

The square root of 142961813 is about 11956.6639578103. The cubic root of 142961813 is about 522.8856007562.

The spelling of 142961813 in words is "one hundred forty-two million, nine hundred sixty-one thousand, eight hundred thirteen".