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1311025 = 522292
BaseRepresentation
bin101000000000100110001
32110121101111
411000010301
5313423100
644033321
714100142
oct5000461
92417344
101311025
11815aa1
12532841
1336b971
14261ac9
151ad6ba
hex140131

1311025 has 9 divisors (see below), whose sum is σ = 1632801. Its totient is φ = 1044240.

The previous prime is 1311001. The next prime is 1311029. The reversal of 1311025 is 5201131.

The square root of 1311025 is 1145.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 178929 + 1132096 = 423^2 + 1064^2 .

It is not a de Polignac number, because 1311025 - 25 = 1310993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310996 and 1311014.

It is not an unprimeable number, because it can be changed into a prime (1311029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5611 + ... + 5839.

21311025 is an apocalyptic number.

1311025 is the 1145-th square number.

1311025 is the 573-rd centered octagonal number.

It is an amenable number.

1311025 is a deficient number, since it is larger than the sum of its proper divisors (321776).

1311025 is an frugal number, since it uses more digits than its factorization.

1311025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The cubic root of 1311025 is about 109.4469485791.

The spelling of 1311025 in words is "one million, three hundred eleven thousand, twenty-five".

Divisors: 1 5 25 229 1145 5725 52441 262205 1311025