142935421 has 2 divisors, whose sum is σ = 142935422. Its totient is φ = 142935420.

The previous prime is 142935407. The next prime is 142935431. The reversal of 142935421 is 124539241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 8491396 = 11595^2 + 2914^2 .

It is a cyclic number.

It is not a de Polignac number, because 142935421 - 2⁷ = 142935293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142935431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71467710 + 71467711.

It is an arithmetic number, because the mean of its divisors is an integer number (71467711).

Almost surely, 2^142935421 is an apocalyptic number.

It is an amenable number.

142935421 is a deficient number, since it is larger than the sum of its proper divisors (1).

142935421 is an equidigital number, since it uses as much as digits as its factorization.

142935421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 142935421 is about 11955.5602545427. The cubic root of 142935421 is about 522.8534223588.

The spelling of 142935421 in words is "one hundred forty-two million, nine hundred thirty-five thousand, four hundred twenty-one".