1200251055 has 16 divisors (see below), whose sum is σ = 1924231680. Its totient is φ = 638857248.

The previous prime is 1200251009. The next prime is 1200251081. The reversal of 1200251055 is 5501520021.

It is not a de Polignac number, because 1200251055 - 2¹¹ = 1200249007 is a prime.

It is a super-2 number, since 2×1200251055² = 2881205190057226050, 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 15 ways as a sum of consecutive naturals, for example, 71995 + ... + 87084.

It is an arithmetic number, because the mean of its divisors is an integer number (120264480).

Almost surely, 2^1200251055 is an apocalyptic number.

1200251055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200251055 is a deficient number, since it is larger than the sum of its proper divisors (723980625).

1200251055 is a wasteful number, since it uses less digits than its factorization.

1200251055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159590.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 1200251055 is about 34644.6396286641. The cubic root of 1200251055 is about 1062.7326711671.

Adding to 1200251055 its reverse (5501520021), we get a palindrome (6701771076).

The spelling of 1200251055 in words is "one billion, two hundred million, two hundred fifty-one thousand, fifty-five".