142946477 has 2 divisors, whose sum is σ = 142946478. Its totient is φ = 142946476.

The previous prime is 142946437. The next prime is 142946509. The reversal of 142946477 is 774649241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 57365476 = 9251^2 + 7574^2 .

It is an emirp because it is prime and its reverse (774649241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142946477 - 2¹⁴ = 142930093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142946407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71473238 + 71473239.

It is an arithmetic number, because the mean of its divisors is an integer number (71473239).

Almost surely, 2^142946477 is an apocalyptic number.

It is an amenable number.

142946477 is a deficient number, since it is larger than the sum of its proper divisors (1).

142946477 is an equidigital number, since it uses as much as digits as its factorization.

142946477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 142946477 is about 11956.0226246022. The cubic root of 142946477 is about 522.8669028485.

The spelling of 142946477 in words is "one hundred forty-two million, nine hundred forty-six thousand, four hundred seventy-seven".