1161270 has 128 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 253440.

The previous prime is 1161269. The next prime is 1161289. The reversal of 1161270 is 721611.

1161270 = T₄ + T₅ + ... + T₁₉₀.

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

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, 50479 + ... + 50501.

It is an arithmetic number, because the mean of its divisors is an integer number (29160).

2^1161270 is an apocalyptic number.

1161270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1866240).

1161270 is an abundant number, since it is smaller than the sum of its proper divisors (2571210).

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

1161270 is a wasteful number, since it uses less digits than its factorization.

1161270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 1161270 is about 1077.6223828410. The cubic root of 1161270 is about 105.1100886174.

Adding to 1161270 its reverse (721611), we get a palindrome (1882881).

It can be divided in two parts, 1161 and 270, that added together give a triangular number (1431 = T₅₃).

The spelling of 1161270 in words is "one million, one hundred sixty-one thousand, two hundred seventy".