1299427390 has 16 divisors (see below), whose sum is σ = 2339471808. Its totient is φ = 519659296.

The previous prime is 1299427379. The next prime is 1299427397. The reversal of 1299427390 is 937249921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1299427390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299427397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48024 + ... + 70036.

It is an arithmetic number, because the mean of its divisors is an integer number (146216988).

Almost surely, 2^1299427390 is an apocalyptic number.

1299427390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1299427390 is a deficient number, since it is larger than the sum of its proper divisors (1040044418).

1299427390 is a wasteful number, since it uses less digits than its factorization.

1299427390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27923.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 1299427390 is about 36047.5712080578. The cubic root of 1299427390 is about 1091.2326178670.

The spelling of 1299427390 in words is "one billion, two hundred ninety-nine million, four hundred twenty-seven thousand, three hundred ninety".