1201426599 has 4 divisors (see below), whose sum is σ = 1601902136. Its totient is φ = 800951064.

The previous prime is 1201426559. The next prime is 1201426609. The reversal of 1201426599 is 9956241021.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1201426599 - 2⁹ = 1201426087 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 (1201426559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200237764 + ... + 200237769.

It is an arithmetic number, because the mean of its divisors is an integer number (400475534).

Almost surely, 2^1201426599 is an apocalyptic number.

1201426599 is a deficient number, since it is larger than the sum of its proper divisors (400475537).

1201426599 is an equidigital number, since it uses as much as digits as its factorization.

1201426599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400475536.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 1201426599 is about 34661.6012180626. The cubic root of 1201426599 is about 1063.0795100984.

It can be divided in two parts, 1201426 and 599, that added together give a triangular number (1202025 = T₁₅₅₀).

The spelling of 1201426599 in words is "one billion, two hundred one million, four hundred twenty-six thousand, five hundred ninety-nine".