1011955 has 16 divisors (see below), whose sum is σ = 1437120. Its totient is φ = 669312.

The previous prime is 1011947. The next prime is 1011961. The reversal of 1011955 is 5591101.

It is not a de Polignac number, because 1011955 - 2³ = 1011947 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 517 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (89820).

2^1011955 is an apocalyptic number.

1011955 is a deficient number, since it is larger than the sum of its proper divisors (425165).

1011955 is an equidigital number, since it uses as much as digits as its factorization.

1011955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 1011955 is about 1005.9597407451. The cubic root of 1011955 is about 100.3969224413.

The spelling of 1011955 in words is "one million, eleven thousand, nine hundred fifty-five".