1305245542 has 4 divisors (see below), whose sum is σ = 1957868316. Its totient is φ = 652622770.

The previous prime is 1305245531. The next prime is 1305245551. The reversal of 1305245542 is 2455425031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2455425031 = 257 ⋅9554183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326311384 + ... + 326311387.

It is an arithmetic number, because the mean of its divisors is an integer number (489467079).

Almost surely, 2^1305245542 is an apocalyptic number.

1305245542 is a deficient number, since it is larger than the sum of its proper divisors (652622774).

1305245542 is an equidigital number, since it uses as much as digits as its factorization.

1305245542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652622773.

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 1305245542 is about 36128.1821020654. The cubic root of 1305245542 is about 1092.8588482677.

The spelling of 1305245542 in words is "one billion, three hundred five million, two hundred forty-five thousand, five hundred forty-two".