1269120720 has 320 divisors, whose sum is σ = 4893543936. Its totient is φ = 265420800.

The previous prime is 1269120679. The next prime is 1269120731. The reversal of 1269120720 is 270219621.

1269120720 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1269120720² = 3221334803866636800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1056120 + ... + 1057320.

Almost surely, 2^1269120720 is an apocalyptic number.

1269120720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1269120720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2446771968).

1269120720 is an abundant number, since it is smaller than the sum of its proper divisors (3624423216).

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

1269120720 is a wasteful number, since it uses less digits than its factorization.

1269120720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1272 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1269120720 is about 35624.7206304835. The cubic root of 1269120720 is about 1082.6821537241.

It can be divided in two parts, 12691 and 20720, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 1269120720 in words is "one billion, two hundred sixty-nine million, one hundred twenty thousand, seven hundred twenty".