1642222429 has 2 divisors, whose sum is σ = 1642222430. Its totient is φ = 1642222428.

The previous prime is 1642222399. The next prime is 1642222447. The reversal of 1642222429 is 9242222461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1642113529 + 108900 = 40523^2 + 330^2 .

It is an emirp because it is prime and its reverse (9242222461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1642222429 - 2⁵ = 1642222397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1642222394 and 1642222403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642222499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821111214 + 821111215.

It is an arithmetic number, because the mean of its divisors is an integer number (821111215).

Almost surely, 2^1642222429 is an apocalyptic number.

It is an amenable number.

1642222429 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642222429 is an equidigital number, since it uses as much as digits as its factorization.

1642222429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 34.

The square root of 1642222429 is about 40524.3436590897. The cubic root of 1642222429 is about 1179.8061610641.

The spelling of 1642222429 in words is "one billion, six hundred forty-two million, two hundred twenty-two thousand, four hundred twenty-nine".