1264200120 has 48 divisors (see below), whose sum is σ = 4108651560. Its totient is φ = 337119936.

The previous prime is 1264200097. The next prime is 1264200143. The reversal of 1264200120 is 210024621.

1264200120 is a `hidden beast` number, since 1 + 2 + 642 + 0 + 0 + 1 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (1264200097) and next prime (1264200143).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1264200093 and 1264200102.

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, 1755474 + ... + 1756193.

Almost surely, 2^1264200120 is an apocalyptic number.

1264200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264200120 is an abundant number, since it is smaller than the sum of its proper divisors (2844451440).

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

1264200120 is a wasteful number, since it uses less digits than its factorization.

1264200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511684 (or 3511677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1264200120 is about 35555.5919652591. The cubic root of 1264200120 is about 1081.2810929391.

Adding to 1264200120 its reverse (210024621), we get a palindrome (1474224741).

The spelling of 1264200120 in words is "one billion, two hundred sixty-four million, two hundred thousand, one hundred twenty".