1901061 has 6 divisors (see below), whose sum is σ = 2745990. Its totient is φ = 1267368.

The previous prime is 1901033. The next prime is 1901087. The reversal of 1901061 is 1601091.

It can be written as a sum of positive squares in only one way, i.e., 1640961 + 260100 = 1281^2 + 510^2 .

It is not a de Polignac number, because 1901061 - 2¹⁰ = 1900037 is a prime.

It is a super-2 number, since 2×1901061² = 7228065851442, which contains 22 as substring.

1901061 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1901021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105606 + ... + 105623.

It is an arithmetic number, because the mean of its divisors is an integer number (457665).

2^1901061 is an apocalyptic number.

It is an amenable number.

1901061 is a deficient number, since it is larger than the sum of its proper divisors (844929).

1901061 is a wasteful number, since it uses less digits than its factorization.

1901061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211235 (or 211232 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 1901061 is about 1378.7896866455. The cubic root of 1901061 is about 123.8792833156.

The spelling of 1901061 in words is "one million, nine hundred one thousand, sixty-one".