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156949 = 1312073
BaseRepresentation
bin100110010100010101
321222021221
4212110111
520010244
63210341
71222402
oct462425
9258257
10156949
11a7a11
12769b1
1356590
14412a9
1531784
hex26515

156949 has 4 divisors (see below), whose sum is σ = 169036. Its totient is φ = 144864.

The previous prime is 156943. The next prime is 156967. The reversal of 156949 is 949651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11025 + 145924 = 105^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 156949 - 23 = 156941 is a prime.

It is a Duffinian number.

156949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156941) 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, 6024 + ... + 6049.

It is an arithmetic number, because the mean of its divisors is an integer number (42259).

2156949 is an apocalyptic number.

It is an amenable number.

156949 is a deficient number, since it is larger than the sum of its proper divisors (12087).

156949 is a wasteful number, since it uses less digits than its factorization.

156949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12086.

The product of its digits is 9720, while the sum is 34.

The square root of 156949 is about 396.1678937016. The cubic root of 156949 is about 53.9410651036.

It can be divided in two parts, 15694 and 9, that multiplied together give a triangular number (141246 = T531).

The spelling of 156949 in words is "one hundred fifty-six thousand, nine hundred forty-nine".

Divisors: 1 13 12073 156949