1305225442 has 4 divisors (see below), whose sum is σ = 1957838166. Its totient is φ = 652612720.

The previous prime is 1305225437. The next prime is 1305225461. The reversal of 1305225442 is 2445225031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2445225031 = 37 ⋅66087163.

It can be written as a sum of positive squares in only one way, i.e., 1262309841 + 42915601 = 35529^2 + 6551^2 .

It is a super-2 number, since 2×1305225442² = 3407226908888190728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1305225442.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326306359 + ... + 326306362.

Almost surely, 2^1305225442 is an apocalyptic number.

1305225442 is a deficient number, since it is larger than the sum of its proper divisors (652612724).

1305225442 is an equidigital number, since it uses as much as digits as its factorization.

1305225442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652612723.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1305225442 is about 36127.9039248058. The cubic root of 1305225442 is about 1092.8532384483.

The spelling of 1305225442 in words is "one billion, three hundred five million, two hundred twenty-five thousand, four hundred forty-two".