1299605542 has 16 divisors (see below), whose sum is σ = 1968324912. Its totient is φ = 643507200.

The previous prime is 1299605539. The next prime is 1299605557. The reversal of 1299605542 is 2455069921.

It is a super-2 number, since 2×1299605542² = 3377949129594227528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454417 + ... + 457267.

It is an arithmetic number, because the mean of its divisors is an integer number (123020307).

Almost surely, 2^1299605542 is an apocalyptic number.

1299605542 is a deficient number, since it is larger than the sum of its proper divisors (668719370).

1299605542 is a wasteful number, since it uses less digits than its factorization.

1299605542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4983.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 1299605542 is about 36050.0421913761. The cubic root of 1299605542 is about 1091.2824850600.

It can be divided in two parts, 1299 and 605542, that added together give a square (606841 = 779²).

The spelling of 1299605542 in words is "one billion, two hundred ninety-nine million, six hundred five thousand, five hundred forty-two".