1200440051 has 4 divisors (see below), whose sum is σ = 1207146600. Its totient is φ = 1193733504.

The previous prime is 1200440047. The next prime is 1200440053. The reversal of 1200440051 is 1500440021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200440051 - 2² = 1200440047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200440053) 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, 3353006 + ... + 3353363.

It is an arithmetic number, because the mean of its divisors is an integer number (301786650).

Almost surely, 2^1200440051 is an apocalyptic number.

1200440051 is a deficient number, since it is larger than the sum of its proper divisors (6706549).

1200440051 is an equidigital number, since it uses as much as digits as its factorization.

1200440051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706548.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1200440051 is about 34647.3671582705. The cubic root of 1200440051 is about 1062.7884488540.

Adding to 1200440051 its reverse (1500440021), we get a palindrome (2700880072).

The spelling of 1200440051 in words is "one billion, two hundred million, four hundred forty thousand, fifty-one".