142213397 has 4 divisors (see below), whose sum is σ = 142401036. Its totient is φ = 142025760.

The previous prime is 142213369. The next prime is 142213403. The reversal of 142213397 is 793312241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793312241 = 457 ⋅1735913.

It can be written as a sum of positive squares in 2 ways, for example, as 32194276 + 110019121 = 5674^2 + 10489^2 .

It is a cyclic number.

It is not a de Polignac number, because 142213397 - 2¹⁰ = 142212373 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 (142213327) 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, 92678 + ... + 94199.

It is an arithmetic number, because the mean of its divisors is an integer number (35600259).

Almost surely, 2^142213397 is an apocalyptic number.

It is an amenable number.

142213397 is a deficient number, since it is larger than the sum of its proper divisors (187639).

142213397 is an equidigital number, since it uses as much as digits as its factorization.

142213397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187638.

The product of its digits is 9072, while the sum is 32.

The square root of 142213397 is about 11925.3258655686. The cubic root of 142213397 is about 521.9715551897.

The spelling of 142213397 in words is "one hundred forty-two million, two hundred thirteen thousand, three hundred ninety-seven".