1210881 has 24 divisors (see below), whose sum is σ = 1946560. Its totient is φ = 655776.

The previous prime is 1210879. The next prime is 1210883. The reversal of 1210881 is 1880121.

1210881 = T₃₃ + T₃₄ + ... + T₁₉₃.

It is an interprime number because it is at equal distance from previous prime (1210879) and next prime (1210883).

It is not a de Polignac number, because 1210881 - 2¹ = 1210879 is a prime.

It is a super-2 number, since 2×1210881² = 2932465592322, which contains 22 as substring.

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

1210881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1210883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11055 + ... + 11163.

2^1210881 is an apocalyptic number.

It is an amenable number.

1210881 is a deficient number, since it is larger than the sum of its proper divisors (735679).

1210881 is a wasteful number, since it uses less digits than its factorization.

1210881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1210881 is about 1100.4003816793. The cubic root of 1210881 is about 106.5860795394.

The spelling of 1210881 in words is "one million, two hundred ten thousand, eight hundred eighty-one".