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148 = 2237
BaseRepresentation
bin10010100
312111
42110
51043
6404
7301
oct224
9174
10148
11125
12104
13b5
14a8
159d
hex94

148 has 6 divisors (see below), whose sum is σ = 266. Its totient is φ = 72.

The previous prime is 139. The next prime is 149. The reversal of 148 is 841.

148 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in only one way, i.e., 144 + 4 = 12^2 + 2^2 .

It is an Ulam number.

148 is an undulating number in base 6.

It is a plaindrome in base 8, base 10, base 11 and base 15.

It is a nialpdrome in base 4, base 13, base 14 and base 16.

It is a congruent number.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15 + ... + 22.

148 is the 8-th heptagonal number.

148 is the 7-th centered heptagonal number.

It is an amenable number.

148 is a deficient number, since it is larger than the sum of its proper divisors (118).

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

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

The sum of its prime factors is 41 (or 39 counting only the distinct ones).

The product of its digits is 32, while the sum is 13.

The square root of 148 is about 12.1655250606. The cubic root of 148 is about 5.2895724727.

The spelling of 148 in words is "one hundred forty-eight", and is thus an aban number.

Divisors: 1 2 4 37 74 148