1292720 has 80 divisors (see below), whose sum is σ = 3562272. Its totient is φ = 430080.

The previous prime is 1292717. The next prime is 1292729. The reversal of 1292720 is 272921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1292720² = 3342249996800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1292729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11384 + ... + 11496.

2^1292720 is an apocalyptic number.

1292720 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 1292720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1781136).

1292720 is an abundant number, since it is smaller than the sum of its proper divisors (2269552).

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

1292720 is a wasteful number, since it uses less digits than its factorization.

1292720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1292720 is about 1136.9784518627. The cubic root of 1292720 is about 108.9351801573.

The spelling of 1292720 in words is "one million, two hundred ninety-two thousand, seven hundred twenty".