1245343999 has 8 divisors (see below), whose sum is σ = 1313504640. Its totient is φ = 1177445016.

The previous prime is 1245343973. The next prime is 1245344041. The reversal of 1245343999 is 9993435421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1245343999 - 2¹⁹ = 1244819711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245343919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55597 + ... + 74710.

It is an arithmetic number, because the mean of its divisors is an integer number (164188080).

Almost surely, 2^1245343999 is an apocalyptic number.

1245343999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1245343999 is a deficient number, since it is larger than the sum of its proper divisors (68160641).

1245343999 is a wasteful number, since it uses less digits than its factorization.

1245343999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130829.

The product of its digits is 1049760, while the sum is 49.

The square root of 1245343999 is about 35289.4318316405. The cubic root of 1245343999 is about 1075.8782076209.

The spelling of 1245343999 in words is "one billion, two hundred forty-five million, three hundred forty-three thousand, nine hundred ninety-nine".