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1955161 = 13223503
BaseRepresentation
bin111011101010101011001
310200022222101
413131111121
51000031121
6105523401
722422115
oct7352531
93608871
101955161
111115a3a
127a3561
13535c00
1438c745
15289491
hex1dd559

1955161 has 12 divisors (see below), whose sum is σ = 2213568. Its totient is φ = 1722864.

The previous prime is 1955141. The next prime is 1955179. The reversal of 1955161 is 1615591.

It is not a de Polignac number, because 1955161 - 27 = 1955033 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1955131) 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 11 ways as a sum of consecutive naturals, for example, 3636 + ... + 4138.

It is an arithmetic number, because the mean of its divisors is an integer number (184464).

21955161 is an apocalyptic number.

It is an amenable number.

1955161 is a deficient number, since it is larger than the sum of its proper divisors (258407).

1955161 is a wasteful number, since it uses less digits than its factorization.

1955161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 539 counting only the distinct ones).

The product of its digits is 1350, while the sum is 28.

The square root of 1955161 is about 1398.2707177081. The cubic root of 1955161 is about 125.0434195828.

It can be divided in two parts, 1955 and 161, that added together give a square (2116 = 462).

The spelling of 1955161 in words is "one million, nine hundred fifty-five thousand, one hundred sixty-one".

Divisors: 1 13 23 169 299 503 3887 6539 11569 85007 150397 1955161