1272810 has 128 divisors (see below), whose sum is σ = 4147200. Its totient is φ = 241920.

The previous prime is 1272749. The next prime is 1272811. The reversal of 1272810 is 182721.

1272810 = T₂₅₂ + T₂₅₃ + ... + T₂₈₆.

1272810 is a nontrivial binomial coefficient, being equal to C(1596, 2).

It is a super-2 number, since 2×1272810² = 3240090592200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43876 + ... + 43904.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2^1272810 is an apocalyptic number.

1272810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1272810 is the 1595-th triangular number and also the 798-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1272810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2073600).

1272810 is an abundant number, since it is smaller than the sum of its proper divisors (2874390).

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

1272810 is a wasteful number, since it uses less digits than its factorization.

1272810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1272810 is about 1128.1888139846. The cubic root of 1272810 is about 108.3730242466.

The spelling of 1272810 in words is "one million, two hundred seventy-two thousand, eight hundred ten".