1231075200 has 96 divisors (see below), whose sum is σ = 4054885560. Its totient is φ = 328284160.

The previous prime is 1231075199. The next prime is 1231075229. The reversal of 1231075200 is 25701321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1231075200² = 3031092296110080000, 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 11 ways as a sum of consecutive naturals, for example, 54519 + ... + 73718.

Almost surely, 2^1231075200 is an apocalyptic number.

1231075200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231075200 is an abundant number, since it is smaller than the sum of its proper divisors (2823810360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231075200 is a wasteful number, since it uses less digits than its factorization.

1231075200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128264 (or 128247 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 1231075200 is about 35086.6812337673. The cubic root of 1231075200 is about 1071.7533775878.

Adding to 1231075200 its reverse (25701321), we get a palindrome (1256776521).

The spelling of 1231075200 in words is "one billion, two hundred thirty-one million, seventy-five thousand, two hundred".