1305630142 has 4 divisors (see below), whose sum is σ = 1958445216. Its totient is φ = 652815070.

The previous prime is 1305630097. The next prime is 1305630149. The reversal of 1305630142 is 2410365031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2410365031 = 41 ⋅58789391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305630149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326407534 + ... + 326407537.

It is an arithmetic number, because the mean of its divisors is an integer number (489611304).

Almost surely, 2^1305630142 is an apocalyptic number.

1305630142 is a deficient number, since it is larger than the sum of its proper divisors (652815074).

1305630142 is an equidigital number, since it uses as much as digits as its factorization.

1305630142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652815073.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1305630142 is about 36133.5044245642. The cubic root of 1305630142 is about 1092.9661773037.

Adding to 1305630142 its reverse (2410365031), we get a palindrome (3715995173).

The spelling of 1305630142 in words is "one billion, three hundred five million, six hundred thirty thousand, one hundred forty-two".