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1091172 = 22390931
BaseRepresentation
bin100001010011001100100
32001102210210
410022121210
5234404142
635215420
712163155
oct4123144
92042723
101091172
116858a5
12447570
132c2884
1420592c
1516849c
hex10a664

1091172 has 12 divisors (see below), whose sum is σ = 2546096. Its totient is φ = 363720.

The previous prime is 1091161. The next prime is 1091173. The reversal of 1091172 is 2711901.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1091173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45454 + ... + 45477.

21091172 is an apocalyptic number.

1091172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091172 is an abundant number, since it is smaller than the sum of its proper divisors (1454924).

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

1091172 is a wasteful number, since it uses less digits than its factorization.

1091172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90938 (or 90936 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 1091172 is about 1044.5917862974. The cubic root of 1091172 is about 102.9511189180.

The spelling of 1091172 in words is "one million, ninety-one thousand, one hundred seventy-two".

Divisors: 1 2 3 4 6 12 90931 181862 272793 363724 545586 1091172